German Wissen vs Kennen vs Können: Translate Know

German Wissen, Kennen and Können: Three Kinds of Know: Wissen commonly expresses knowledge of facts, answers and clauses; kennen expresses familiarity with people, places or things; können expresses ability or learned skill. English know can cover all three, so a reliable translation begins with the kind of knowledge, not the English word alone.

People who search for German wissen vs kennen, kennen vs wissen, können vs wissen, how to say know in German are often trying to solve a practical problem: a sentence looks easy until two expressions carry different information. This guide gives a direct answer, then shows how to make and test the decision in authentic-sized sentences, not only isolated vocabulary pairs. Its job is the specific contrast named above; broader context, tone, idioms and terminology are covered in other eduKateSG translation guides.

Quick reference: wissen: knowing facts, answers and information, frequently in a dass, ob or question-word clause; kennen: being acquainted or familiar with a noun or pronoun, usually in the accusative; können: being able to do something, with a following infinitive or suitable ellipsis; and wissen and können may both appear with wie, but knowing the instructions is not automatically having the ability. Start with the function of the whole clause, test the relevant grammar, and reread the target sentence as a reader who has never seen the original. The best translation is the one that preserves what the source actually asks, says or implies.

The visible translation problem: one familiar English word can conceal two different jobs

I know the answer, I know Berlin and I know how to swim can all sound parallel in English, but they are not parallel German sentences. They assert knowledge of a fact, personal familiarity with a place, and practical ability. Using one German verb for all three can distort the relationship to a person, suggest a skill the speaker lacks, or leave a subordinate clause attached to the wrong verb.

Consider the reader’s task before choosing vocabulary. A reader may need to act on a deadline, judge a person’s competence, find a location, or understand whether praise concerns a product or someone’s conduct. The misleading short translation often seems harmless because both versions share a dictionary gloss. In a live instruction, however, the difference can alter expectations, the sequence of actions or the relationship between people. A responsible translator therefore records the communicative job of the sentence before drafting elegant English.

The first correction is to stop substituting word against word. Identify what has been introduced to the conversation, what the speaker already assumes the listener knows, which verb or phrase controls the sentence, and what can reasonably be inferred. Some sentences have more than one valid English rendering, but not every fluent English sentence is faithful. A translation may sound smooth and still answer a different question. That is precisely the error these examples are designed to catch.

One-minute answer and first-principles map

wissen: knowing facts, answers and information, frequently in a dass, ob or question-word clause
kennen: being acquainted or familiar with a noun or pronoun, usually in the accusative
können: being able to do something, with a following infinitive or suitable ellipsis
wissen and können may both appear with wie, but knowing the instructions is not automatically having the ability

These principles are not a promise that one simple rule covers every dialect, fixed expression or literary use. They are a disciplined starting point. A good grammar explanation should survive three tests: a positive example where the distinction is clear, a near-neighbour in which changing the expression changes meaning, and a real sentence where context settles the choice. The worked pairs below run these tests repeatedly. Each pair is a small experiment, not a claim that the two source sentences are otherwise equivalent.

Ten foundations that make the distinction reliable

1. Three semantic questions

First ask whether the speaker knows information, has encountered something, or can carry out a skill. This diagnostic is more reliable than memorising one English gloss because English know groups distinct relations.

2. Complement structure

Wissen readily introduces facts and subordinate clauses; kennen normally takes an accusative noun phrase. Können usually modifies another verb. The shape of what follows is often the fastest clue.

3. People and introductions

Ich kenne sie asserts acquaintance, whereas ich weiß, wer sie ist gives identity information. A translator who swaps them can invent a personal relationship.

4. Places and directions

Ich kenne Hamburg suggests familiarity with the city; ich weiß, wo Hamburg liegt indicates knowledge of its location. Knowing a map fact is not equivalent to having visited.

5. Skill and instructions

Ich weiß, wie das funktioniert identifies an understanding of a process; ich kann das bedienen asserts the ability to operate it. Both can be true, but one need not entail the other.

6. Verb placement

In German subordinate clauses, conjugated wissen can introduce a verb-final embedded clause. The translator must translate the facts and restructure clauses naturally rather than copying German word order.

7. Accusative and pronouns

Kennen takes objects such as ihn, sie, den Film or die Stadt. Check whether the original really names a familiar entity or merely a piece of information.

8. Conjugation

Wissen has ich weiß and er weiß; kennen has ich kenne and er kennt; können has ich kann and er kann. Morphology helps recover who knows or can do something.

9. Doubt and negation

Ich weiß nicht, ob … is uncertainty about a fact. Ich kenne ihn nicht denies acquaintance; ich kann nicht kommen denies ability or availability. English I don’t know can obscure those differences.

10. Polite communication

Kennen Sie …? asks whether somebody is familiar with something. Wissen Sie …? asks whether they possess the relevant information. Können Sie …? often asks for assistance or ability, sometimes functioning as a polite request.

A repeatable twelve-step translation method

Step 1: State the communicative job

Write down whether the sentence is identifying a fact, describing an action, introducing something, giving a deadline or making a judgement. For German, this short statement can keep a familiar English gloss from obscuring the actual job.

Step 2: Bracket the controlling phrase

Mark the smallest complete phrase that contains the choice. The relevant meaning may sit in an adjective with its noun, a verb with its complement, a particle with its temporal clause or a verb of location with its subject.

Step 3: Identify participants and objects

Ask who acts, knows, evaluates, waits, arrives or is located. If the sentence refers to an already identified participant, keep that identification rather than replacing it with an indefinite new one.

Step 4: Inspect time and completion

If the sentence has a time expression, distinguish a continuing activity, a completed event and a mere point of reference. Do not infer past tense, fulfilment or precise closing times from the English phrase alone.

Step 5: Read grammatical evidence

Check agreement, number, verb form, particle, preposition and complement structure. These are not decoration: they tell the reader what the word modifies and where its force extends.

Step 6: Read the preceding sentence

The previous sentence may name the referent, establish the deadline or reveal why the speaker makes the judgement. Ask whether the next sentence continues that shared information or introduces a new item.

Step 7: Draft a literal diagnostic gloss

Make a short internal gloss if it helps expose the structure, but do not publish a rigid word-for-word rendering. A gloss is a diagnostic instrument, not the finished translation.

Step 8: Choose a natural target sentence

Write English that a competent reader would use in the situation. Preserve the source claim first, then adjust sentence order, register and collocation so the target does not feel mechanically imported.

Step 9: Run a contrastive substitution test

Try the other expression in the source sentence and ask what would change. If it alters the claim, those variants should not receive one undifferentiated English translation.

Step 10: Audit for introduced claims

Look for accidental claims about certainty, familiarity, ability, availability, completed actions or quality. Delete facts that were not supplied, even when they make the English sound smoother.

Step 11: Test as an instruction or reply

Imagine someone acting on the translation or responding naturally to it. If their response would be wrong for the source, revise the translation rather than explaining the error away.

Step 12: Record and transfer the rule

Keep a brief error log containing the source, your first version, the corrected version and the reason. Revisit it with a new topic or setting so the rule becomes transferable rather than memorised for one example.

Thirty-six contrastive worked examples with commentary

Read each pair as two separate pieces of source evidence. First cover the English, identify which distinction the source encodes, then uncover the translation and explanation. Repeat in the reverse direction: begin with the English and predict the source pattern. The paired design matters because knowing one textbook example is easier than noticing what changes when the topic, people, activity or reference point changes.

Worked pair 1: the smallest change that matters

Source A: Ich weiß, wann der Zug fährt. Natural English: I know when the train leaves.

Source B: Ich kenne den Bahnhof gut. Natural English: I know the station well.

One is schedule information; the other is familiarity with the station. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 2: the smallest change that matters

Source A: Kennst du meinen Bruder? Natural English: Do you know my brother?

Source B: Weißt du, wer mein Bruder ist? Natural English: Do you know who my brother is?

Personal acquaintance and identifying information are not equivalent. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 3: the smallest change that matters

Source A: Ich kann schwimmen. Natural English: I can swim.

Source B: Ich weiß, wie man schwimmt. Natural English: I know how swimming works.

Ability to swim and knowledge of the technique need not coincide. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 4: the smallest change that matters

Source A: Sie kennt die Stadt. Natural English: She knows the city.

Source B: Sie weiß, wo die Stadt liegt. Natural English: She knows where the city is located.

Experience of a place differs from knowing its position on a map. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 5: the smallest change that matters

Source A: Ich weiß die Antwort. Natural English: I know the answer.

Source B: Ich kenne diesen Ausdruck. Natural English: I am familiar with this expression.

Knowing an answer and recognizing an expression describe different relations. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 6: the smallest change that matters

Source A: Er kann Klavier spielen. Natural English: He can play the piano.

Source B: Er weiß, wie das Klavier gestimmt wird. Natural English: He knows how the piano is tuned.

A performing skill and knowledge of a procedure are distinct. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 7: the smallest change that matters

Source A: Wissen Sie, ob das Büro geöffnet ist? Natural English: Do you know whether the office is open?

Source B: Kennen Sie dieses Büro? Natural English: Are you familiar with this office?

An indirect yes/no question requires factual knowledge; acquaintance targets the place. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 8: the smallest change that matters

Source A: Ich kenne diesen Roman. Natural English: I know this novel.

Source B: Ich weiß, dass der Roman verfilmt wurde. Natural English: I know that the novel was adapted into a film.

Familiarity with a book is not the same as knowing one fact about it. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 9: the smallest change that matters

Source A: Wir können morgen kommen. Natural English: We can come tomorrow.

Source B: Wir wissen, dass morgen ein Feiertag ist. Natural English: We know that tomorrow is a public holiday.

The first expresses possibility or ability; the second information. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 10: the smallest change that matters

Source A: Sie kennt sich mit Computern aus. Natural English: She knows her way around computers.

Source B: Sie weiß, wann das Update startet. Natural English: She knows when the update begins.

Practical familiarity with a subject differs from knowledge of a particular time. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 11: the smallest change that matters

Source A: Ich kenne den Weg. Natural English: I know the route.

Source B: Ich weiß, wo wir abbiegen müssen. Natural English: I know where we have to turn.

One suggests familiarity with a route; the other identifies a specific decision point. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 12: the smallest change that matters

Source A: Kannst du mir helfen? Natural English: Can you help me?

Source B: Weißt du, wie man mir helfen kann? Natural English: Do you know how someone can help me?

A direct request and a question about possible methods differ in conversational force. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 13: the smallest change that matters

Source A: Ich weiß nicht, warum sie geht. Natural English: I do not know why she is leaving.

Source B: Ich kenne sie nicht. Natural English: I do not know her.

Uncertainty about a reason does not deny acquaintance. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 14: the smallest change that matters

Source A: Er kennt unsere Lehrerin. Natural English: He knows our teacher.

Source B: Er kann den Text übersetzen. Natural English: He can translate the text.

The pronoun relation is social familiarity; the second is a demonstrated linguistic skill. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 15: the smallest change that matters

Source A: Ich weiß, dass das stimmt. Natural English: I know that this is true.

Source B: Ich kenne diese Behauptung. Natural English: I am familiar with this claim.

Knowledge of truth differs from prior exposure to a claim. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 16: the smallest change that matters

Source A: Sie kann gut Deutsch. Natural English: She knows German well enough to use it.

Source B: Sie weiß viel über die deutsche Sprache. Natural English: She knows a great deal about the German language.

Speaking a language and possessing facts about linguistics are different accomplishments. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 17: the smallest change that matters

Source A: Kennst du eine gute Bäckerei? Natural English: Do you know a good bakery?

Source B: Weißt du, wo eine gute Bäckerei ist? Natural English: Do you know where a good bakery is?

Recommendations based on familiarity and the question of location can lead to different responses. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Worked pair 18: the smallest change that matters

Source A: Ich kann das Gerät nicht bedienen. Natural English: I cannot operate the device.

Source B: Ich weiß nicht, wie das Gerät funktioniert. Natural English: I do not know how the device works.

Inability and ignorance of procedure should not be collapsed into one assertion. Notice that the source does not merely offer a different spelling of the same proposition. It guides the listener toward a different question, attribute, event or relationship. Read each version as if it were printed alone on a sign, in an email or in conversation: would the reader be expected to locate something, assess something, continue an activity, or respond to a question? Preserve that expectation in the English.

Failure modes: twelve ways an apparently fluent translation changes meaning

Failure 1: Avoid use kennen to introduce a dass clause describing a fact

Do not use kennen to introduce a dass clause describing a fact; check the clause complement.

Failure 2: Avoid use wissen for direct personal acquaintance when the speaker says they know a person.

Do not use wissen for direct personal acquaintance when the speaker says they know a person.

Failure 3: Avoid equate being familiar with a city with knowing one geographical fact about it.

Do not equate being familiar with a city with knowing one geographical fact about it.

Failure 4: Avoid turn knowing an instruction into the ability to perform a task safely or successfully.

Do not turn knowing an instruction into the ability to perform a task safely or successfully.

Failure 5: Avoid overlook können as a modal verb before an infinitive.

Do not overlook können as a modal verb before an infinitive.

Failure 6: Avoid substitute kennen for every English know about a film or idea

Do not substitute kennen for every English know about a film or idea; distinguish recognition from a claim of truth.

Failure 7: Avoid translate ich weiß nicht, ob as I do not know when

Do not translate ich weiß nicht, ob as I do not know when; ob is whether.

Failure 8: Avoid mis-conjugate weiß as a regular verb form.

Do not mis-conjugate weiß as a regular verb form.

Failure 9: Avoid treat kann nicht kommen as I do not know to come

Do not treat kann nicht kommen as I do not know to come; it refers to ability or availability.

Failure 10: Avoid translate Können Sie …? literally without considering its polite request function.

Do not translate Können Sie …? literally without considering its polite request function.

Failure 11: Avoid assume kennen indicates intimate friendship

Do not assume kennen indicates intimate friendship; it can be simple familiarity.

Failure 12: Avoid assert competence based solely on somebody’s intellectual understanding of a procedure.

Do not assert competence based solely on somebody’s intellectual understanding of a procedure.

Practice and transfer: eighteen short retrieval exercises

For each item below, cover the supplied translation. Decide what the highlighted grammar or context contributes, draft a full English sentence, then compare with the worked answer. The answer is a model, not the only possible natural wording. Where the source has a distinct second variant, explain why the two should not be merged. This is retrieval and contrast practice, not a substitute for reading longer real texts.

Exercise 1: choose the correct meaning from the pair

Translate independently: Ich weiß, wann der Zug fährt.. Then compare with Ich kenne den Bahnhof gut. and explain how the meaning changes.

Model answer: I know when the train leaves.. Contrast answer: I know the station well.. One is schedule information; the other is familiarity with the station.

Exercise 2: choose the correct meaning from the pair

Translate independently: Weißt du, wer mein Bruder ist?. Then compare with Kennst du meinen Bruder? and explain how the meaning changes.

Model answer: Do you know who my brother is?. Contrast answer: Do you know my brother?. Personal acquaintance and identifying information are not equivalent.

Exercise 3: choose the correct meaning from the pair

Translate independently: Ich kann schwimmen.. Then compare with Ich weiß, wie man schwimmt. and explain how the meaning changes.

Model answer: I can swim.. Contrast answer: I know how swimming works.. Ability to swim and knowledge of the technique need not coincide.

Exercise 4: choose the correct meaning from the pair

Translate independently: Sie weiß, wo die Stadt liegt.. Then compare with Sie kennt die Stadt. and explain how the meaning changes.

Model answer: She knows where the city is located.. Contrast answer: She knows the city.. Experience of a place differs from knowing its position on a map.

Exercise 5: choose the correct meaning from the pair

Translate independently: Ich weiß die Antwort.. Then compare with Ich kenne diesen Ausdruck. and explain how the meaning changes.

Model answer: I know the answer.. Contrast answer: I am familiar with this expression.. Knowing an answer and recognizing an expression describe different relations.

Exercise 6: choose the correct meaning from the pair

Translate independently: Er weiß, wie das Klavier gestimmt wird.. Then compare with Er kann Klavier spielen. and explain how the meaning changes.

Model answer: He knows how the piano is tuned.. Contrast answer: He can play the piano.. A performing skill and knowledge of a procedure are distinct.

Exercise 7: choose the correct meaning from the pair

Translate independently: Wissen Sie, ob das Büro geöffnet ist?. Then compare with Kennen Sie dieses Büro? and explain how the meaning changes.

Model answer: Do you know whether the office is open?. Contrast answer: Are you familiar with this office?. An indirect yes/no question requires factual knowledge; acquaintance targets the place.

Exercise 8: choose the correct meaning from the pair

Translate independently: Ich weiß, dass der Roman verfilmt wurde.. Then compare with Ich kenne diesen Roman. and explain how the meaning changes.

Model answer: I know that the novel was adapted into a film.. Contrast answer: I know this novel.. Familiarity with a book is not the same as knowing one fact about it.

Exercise 9: choose the correct meaning from the pair

Translate independently: Wir können morgen kommen.. Then compare with Wir wissen, dass morgen ein Feiertag ist. and explain how the meaning changes.

Model answer: We can come tomorrow.. Contrast answer: We know that tomorrow is a public holiday.. The first expresses possibility or ability; the second information.

Exercise 10: choose the correct meaning from the pair

Translate independently: Sie weiß, wann das Update startet.. Then compare with Sie kennt sich mit Computern aus. and explain how the meaning changes.

Model answer: She knows when the update begins.. Contrast answer: She knows her way around computers.. Practical familiarity with a subject differs from knowledge of a particular time.

Exercise 11: choose the correct meaning from the pair

Translate independently: Ich kenne den Weg.. Then compare with Ich weiß, wo wir abbiegen müssen. and explain how the meaning changes.

Model answer: I know the route.. Contrast answer: I know where we have to turn.. One suggests familiarity with a route; the other identifies a specific decision point.

Exercise 12: choose the correct meaning from the pair

Translate independently: Weißt du, wie man mir helfen kann?. Then compare with Kannst du mir helfen? and explain how the meaning changes.

Model answer: Do you know how someone can help me?. Contrast answer: Can you help me?. A direct request and a question about possible methods differ in conversational force.

Exercise 13: choose the correct meaning from the pair

Translate independently: Ich weiß nicht, warum sie geht.. Then compare with Ich kenne sie nicht. and explain how the meaning changes.

Model answer: I do not know why she is leaving.. Contrast answer: I do not know her.. Uncertainty about a reason does not deny acquaintance.

Exercise 14: choose the correct meaning from the pair

Translate independently: Er kann den Text übersetzen.. Then compare with Er kennt unsere Lehrerin. and explain how the meaning changes.

Model answer: He can translate the text.. Contrast answer: He knows our teacher.. The pronoun relation is social familiarity; the second is a demonstrated linguistic skill.

Exercise 15: choose the correct meaning from the pair

Translate independently: Ich weiß, dass das stimmt.. Then compare with Ich kenne diese Behauptung. and explain how the meaning changes.

Model answer: I know that this is true.. Contrast answer: I am familiar with this claim.. Knowledge of truth differs from prior exposure to a claim.

Exercise 16: choose the correct meaning from the pair

Translate independently: Sie weiß viel über die deutsche Sprache.. Then compare with Sie kann gut Deutsch. and explain how the meaning changes.

Model answer: She knows a great deal about the German language.. Contrast answer: She knows German well enough to use it.. Speaking a language and possessing facts about linguistics are different accomplishments.

Exercise 17: choose the correct meaning from the pair

Translate independently: Kennst du eine gute Bäckerei?. Then compare with Weißt du, wo eine gute Bäckerei ist? and explain how the meaning changes.

Model answer: Do you know a good bakery?. Contrast answer: Do you know where a good bakery is?. Recommendations based on familiarity and the question of location can lead to different responses.

Exercise 18: choose the correct meaning from the pair

Translate independently: Ich weiß nicht, wie das Gerät funktioniert.. Then compare with Ich kann das Gerät nicht bedienen. and explain how the meaning changes.

Model answer: I do not know how the device works.. Contrast answer: I cannot operate the device.. Inability and ignorance of procedure should not be collapsed into one assertion.

Transfer to real communication: eight situations

1. School discussion of what a learner knows

Contrast Kennst du meinen Bruder? — Do you know my brother? with Weißt du, wer mein Bruder ist? — Do you know who my brother is?. Personal acquaintance and identifying information are not equivalent. If this appeared in a message about school discussion of what a learner knows, the reader’s next step would depend on that contrast. Preserve the distinction before shortening or simplifying the text, and retain names, dates, conditions and referents exactly when they appear. If a detail is ambiguous, do not turn that ambiguity into a confident promise.

2. Workplace request for practical help

Contrast Sie kennt die Stadt. — She knows the city. with Sie weiß, wo die Stadt liegt. — She knows where the city is located.. Experience of a place differs from knowing its position on a map. If this appeared in a message about workplace request for practical help, the reader’s next step would depend on that contrast. Preserve the distinction before shortening or simplifying the text, and retain names, dates, conditions and referents exactly when they appear. If a detail is ambiguous, do not turn that ambiguity into a confident promise.

3. Tourist asking about a location

Contrast Er kann Klavier spielen. — He can play the piano. with Er weiß, wie das Klavier gestimmt wird. — He knows how the piano is tuned.. A performing skill and knowledge of a procedure are distinct. If this appeared in a message about tourist asking about a location, the reader’s next step would depend on that contrast. Preserve the distinction before shortening or simplifying the text, and retain names, dates, conditions and referents exactly when they appear. If a detail is ambiguous, do not turn that ambiguity into a confident promise.

4. Introducing a new colleague

Contrast Ich kenne diesen Roman. — I know this novel. with Ich weiß, dass der Roman verfilmt wurde. — I know that the novel was adapted into a film.. Familiarity with a book is not the same as knowing one fact about it. If this appeared in a message about introducing a new colleague, the reader’s next step would depend on that contrast. Preserve the distinction before shortening or simplifying the text, and retain names, dates, conditions and referents exactly when they appear. If a detail is ambiguous, do not turn that ambiguity into a confident promise.

5. Technical operation and user training

Contrast Sie kennt sich mit Computern aus. — She knows her way around computers. with Sie weiß, wann das Update startet. — She knows when the update begins.. Practical familiarity with a subject differs from knowledge of a particular time. If this appeared in a message about technical operation and user training, the reader’s next step would depend on that contrast. Preserve the distinction before shortening or simplifying the text, and retain names, dates, conditions and referents exactly when they appear. If a detail is ambiguous, do not turn that ambiguity into a confident promise.

6. Healthcare appointment scheduling

Contrast Kannst du mir helfen? — Can you help me? with Weißt du, wie man mir helfen kann? — Do you know how someone can help me?. A direct request and a question about possible methods differ in conversational force. If this appeared in a message about healthcare appointment scheduling, the reader’s next step would depend on that contrast. Preserve the distinction before shortening or simplifying the text, and retain names, dates, conditions and referents exactly when they appear. If a detail is ambiguous, do not turn that ambiguity into a confident promise.

7. Literary dialogue about acquaintance

Contrast Er kennt unsere Lehrerin. — He knows our teacher. with Er kann den Text übersetzen. — He can translate the text.. The pronoun relation is social familiarity; the second is a demonstrated linguistic skill. If this appeared in a message about literary dialogue about acquaintance, the reader’s next step would depend on that contrast. Preserve the distinction before shortening or simplifying the text, and retain names, dates, conditions and referents exactly when they appear. If a detail is ambiguous, do not turn that ambiguity into a confident promise.

8. Formal German customer-support exchange

Contrast Sie kann gut Deutsch. — She knows German well enough to use it. with Sie weiß viel über die deutsche Sprache. — She knows a great deal about the German language.. Speaking a language and possessing facts about linguistics are different accomplishments. If this appeared in a message about formal German customer-support exchange, the reader’s next step would depend on that contrast. Preserve the distinction before shortening or simplifying the text, and retain names, dates, conditions and referents exactly when they appear. If a detail is ambiguous, do not turn that ambiguity into a confident promise.

Frequently asked questions

When should I use wissen?

Use it for facts, answers, information and many subordinate clauses introduced by dass, ob and question words. The factual object of knowledge should be recoverable in the translation.

When should I use kennen?

Use it for familiarity with a person, place, object, film, idea or other named entity. It normally takes an accusative object rather than a subordinate fact clause.

When should I use können?

Use it for ability or competence, often with another verb in the infinitive. It can also convey possibility in context.

Is knowing how the same as being able?

No. A person can know how a device operates without being able or qualified to use it. Read the source for its precise claim.

What is the German for I know him?

Ich kenne ihn. The pronoun ihn is the accusative object of kennen and signals familiarity.

What is the German for I know that?

Ich weiß das or ich weiß, dass … depending on whether a clause follows. Wissen states possession of information.

Can wissen take an object?

Yes, such as die Antwort or das. It is not limited to subordinate clauses; semantic tests still matter.

Can kennen mean recognise?

In some contexts it overlaps with knowing or recognising something through familiarity. Do not imply direct personal acquaintance merely because kennen appears.

Why is I know German usually ich kann Deutsch?

Knowing a language often means communicative ability. Können captures the skill, while wissen can refer to facts about the language.

How should I translate a polite question with können?

Determine whether it is a genuine ability question or a conventional request. Can you please …? may be more appropriate than a bare capability statement.

How to self-correct an unfamiliar sentence

Use the following transfer test on a new sentence you have not practised. Underline the contested expression. Circle the noun, action or clause to which it belongs. Write a one-line paraphrase of the intended claim. Then draft two possible English versions and explain which inference each invites. Reject the version that changes the speaker’s commitment. Only after that should you polish wording and punctuation. The sequence may look slower than guessing at first, but it builds a method that works across new subjects.

The error log is a particularly useful learning tool. Divide a page into source text, first attempt, corrected translation, evidence and transfer example. Record one error from this guide, then write a completely new sentence using the same principle. A rule is not truly learned until it holds when the topic changes, and a translation habit is not reliable until it survives a sentence where the easiest English word happens to be misleading.

Final working rule

Wissen commonly expresses knowledge of facts, answers and clauses; kennen expresses familiarity with people, places or things; können expresses ability or learned skill. English know can cover all three, so a reliable translation begins with the kind of knowledge, not the English word alone. When the next sentence is unfamiliar, keep the sequence simple: identify the job, inspect the evidence, translate the meaning, test the contrast and read as a person who must use the result. That method is more dependable than memorising a single English gloss, and it gives learners a repeatable route from uncertainty to a carefully justified translation.

Top Ways to Translate Correctly | German Wissen, Kennen and Können: Three Kinds of Know