Make one action depend on a condition
A condition names a situation on which another action depends. Ich komme, wenn ich Zeit habe means I will come if I have time in an ordinary planning context. The speaker has not necessarily confirmed having time. That uncertainty is part of the message: coming depends on the condition being met. Compare Ich komme, weil ich Zeit habe, where having time is presented as the reason for coming. Replacing one connector with another changes the relationship, even if many words stay identical.
The beginner pattern in this lesson uses wenn with an ordinary present tense condition. German present forms can refer to an upcoming plan when the context makes that time clear. Ich komme morgen, wenn ich Zeit habe therefore does not need a future auxiliary merely because the visit is tomorrow. The main point is the dependency between available time and the visit. Do not translate every English if or when without first identifying its job. Some uses ask a question about time, some introduce an uncertain yes or no issue, and others describe a condition. We will separate these jobs with short, concrete scenarios before adding longer clauses.
Finish the condition with its finite verb
Wenn introduces a dependent clause. In the standard pattern, its finite verb goes at the end: wenn ich Zeit habe, wenn der Bus kommt, or wenn du müde bist. The verb retains the form required by the local subject. Bist agrees with du, while kommt agrees with the singular bus. The subject of the main clause does not control agreement inside the condition.
In Wir gehen, wenn der Bus kommt, the main subject is wir and the main verb is gehen. The dependent subject is der Bus and its verb is kommt. Marking these pairs separately helps prevent a plural ending from spreading into the wrong clause. With a noun object, keep its case: wenn ich einen Stift habe retains the masculine accusative einen Stift. With a possessive phrase, wenn meine Schwester kommt keeps meine Schwester as the subject. Word order is not a reason to discard familiar noun phrase structure. A useful construction method is to say the condition as a short statement first, such as Du bist müde. Add wenn, move bist to the end, and then attach a suitable main message. The resulting clause explains when that main action or suggestion applies.
Watch the decision
Make you are tired into a condition addressed to one familiar person.
- Start with the statement du bist müde.
- Introduce the clause with wenn.
- Move the finite bist after the description while retaining agreement with du.
wenn du müde bist
References for this explanation
- University of Texas Grimm Grammar: Subordinating conjunctions
- University of Texas Grimm Grammar: Present regular verbs
- University of Texas Grimm Grammar: Word order
- University of Texas Grimm Grammar: Sein
- University of Texas Grimm Grammar: Accusative
- University of Texas Grimm Grammar: Possessive determiners in nominative
Front the condition and place the main verb next
Both clause orders are useful. Ich komme, wenn ich Zeit habe places the action before the condition. Wenn ich Zeit habe, komme ich places the condition first. In the second version, the entire dependent clause occupies the first constituent position of the larger sentence. The finite main verb komme follows the comma immediately, and the subject ich comes after it.
Do not write wenn ich Zeit habe, ich komme as a standard complete sentence with this intended structure. It leaves the main verb too late after the opening condition. In writing, use the comma to mark the boundary, but do not treat it as permission to restart an unrelated subject first clause. An optional dann can make the main result explicit: Wenn ich Zeit habe, dann komme ich. You do not need it in the shorter pattern, and adding it is not a substitute for checking the main verb. For initial practice, omit dann so that you can see the basic order clearly. Read the condition and result as one connected message, then switch their order while preserving the meaning. The exercise is successful when the dependency stays the same and each finite verb appears in the position required by its own clause.
Complete the reasoning
Start a promise to help with the condition that you have time.
- Build the condition wenn ich Zeit habe.
- Place the main verb helfe directly after the comma.
- Use ich as the main subject and dir as the dative recipient.
Compare your reasoning
Wenn ich Zeit habe, helfe ich dir.
Distinguish a condition from a question about time
Wann asks for a time. Wann kommst du? asks when you are coming and expects information such as tomorrow or at seven. Wenn introduces a condition or a temporal setting rather than directly asking for the missing time. Ich komme, wenn ich Zeit habe does not ask the listener to name the hour; it explains what the visit depends on.
The question word can also remain inside an indirect question: Ich weiß nicht, wann er kommt means I do not know when he is coming. Compare Ich weiß nicht, ob er kommt, I do not know whether he is coming. The first unknown is the time; the second is whether the visit will happen at all. Neither is the same as the condition Wenn er kommt, bin ich hier, if he comes, I will be here. These contrasts are worth learning as complete small messages. English often uses if for both a condition and an indirect yes or no question, but German uses different words in the examples here. For now, focus your own production on direct wann questions and simple wenn conditions. Recognizing ob prevents you from treating every English if as an automatic instruction to use wenn.
Recognize repeated and future situations
Wenn also introduces temporal situations, often translated as when or whenever. Wenn ich müde bin, trinke ich Wasser describes what I do when I am tired. It can be understood as a repeated situation. The grammar alone does not insist that this happens every day, and the broader context determines how general the habit is. Words such as immer or an explicit routine can make repetition clearer.
For a future situation, Wenn du morgen kommst, bin ich zu Hause can mean when you come tomorrow or if you come tomorrow, depending on whether the visit is expected or still conditional. A beginner should not claim that wenn by itself perfectly marks the difference between English if and when. If certainty matters, add a clarifying statement or ask whether the plan is confirmed. A single completed past occasion often uses als instead: Als ich gestern hier war, war der Laden geschlossen. This lesson introduces that contrast only to set a boundary; it does not require you to master every temporal clause. Use wenn for the real conditions, repeated situations and upcoming plans practiced here. When writing a story about one particular past visit, check the separate temporal pattern instead of automatically reusing wenn.
Put modals and negative conditions into a clear plan
A condition can include ability, permission or obligation. Wenn du kommen kannst, ruf mich an means if you can come, call me. In the dependent clause, kommen remains an infinitive and the finite modal kannst ends the clause. The main clause is an instruction using the familiar singular imperative of anrufen. Its separable prefix an appears at the end of that instruction.
For a statement with less new grammar, use Ich komme, wenn ich nicht arbeiten muss, I will come if I do not have to work. The condition denies an obligation in this context; it does not mean that working is forbidden. The infinitive arbeiten precedes the finite modal muss. Another clear negative condition is Wenn ich keine Zeit habe, komme ich nicht. Keine denies having any time, while nicht denies coming. The two clauses have separate negative elements serving different jobs. Do not assume that one negative word at the beginning somehow negates everything after it. When giving important practical details, make the condition explicit enough that the listener can distinguish no obligation, no ability and no permission. This lesson practices the first two without treating all modal negatives as interchangeable.
References for this explanation
Check the promise your condition actually makes
A conditional sentence does not automatically promise that its condition will happen. Wenn ich Zeit habe, helfe ich dir offers help if time is available. It differs from a direct confirmation that the speaker definitely has time and will help. The verb helfen takes a dative recipient, so dir remains the appropriate pronoun even though the sentence is now conditional. Adding a connector should preserve the underlying verb construction.
A condition may refer to something already completed: Wenn du das Buch gelesen hast, sprechen wir darüber. The perfect auxiliary hast comes at the end of the condition, after the participle gelesen. This gives you a useful recognition example without requiring every new plan to use the perfect. For production, begin with three decisions: what situation must hold, what action follows, and whether you are making a firm promise or a conditional offer. Write two short clauses, choose wenn, and then check agreement and word order. Finally, ask a wann question about a confirmed part of the plan. Separating that question from the condition helps you retrieve the distinction in conversation. In the game, read the described certainty and missing information before selecting a connector.
References for this explanation
- University of Texas Grimm Grammar: Subordinating conjunctions
- University of Texas Grimm Grammar: Word order
- University of Texas Grimm Grammar: Question words
- University of Texas Grimm Grammar: Perfect tense overview
- University of Texas Grimm Grammar: Irregular participles with haben
- University of Texas Grimm Grammar: Dative pronouns
See it in a sentence
Ich komme, wenn ich Zeit habe.
I will come if I have time.
The visit depends on available time in this planning context.
Wenn ich Zeit habe, komme ich.
If I have time, I will come.
The main finite verb follows the fronted condition.
Wir gehen, wenn der Bus kommt.
We will go when the bus comes.
Each clause has its own subject agreement.
Wenn du müde bist, bleib hier.
If you are tired, stay here.
Bist agrees with du.
Wann kommst du?
When are you coming?
Wann asks for time information.
Ich weiß nicht, wann er kommt.
I do not know when he is coming.
The missing information is the time.
Ich weiß nicht, ob er kommt.
I do not know whether he is coming.
The uncertainty concerns whether the visit happens.
Wenn ich müde bin, trinke ich Wasser.
When I am tired, I drink water.
Wenn can describe a repeated situation.
Wenn du kommen kannst, ruf mich an.
If you can come, call me.
The modal ends the condition.
Ich komme, wenn ich nicht arbeiten muss.
I will come if I do not have to work.
The context denies an obligation.
Wenn ich keine Zeit habe, komme ich nicht.
If I have no time, I will not come.
Each clause has its own negation.
Wenn du das Buch gelesen hast, sprechen wir darüber.
When you have read the book, we will talk about it.
The perfect auxiliary follows the participle in the condition.
Notice the difference
Common mistakes
Do not use a time question word for a condition
Instead ofIch komme, wann ich Zeit habe.
For this meaningIch komme, wenn ich Zeit habe.
The intended message makes the visit conditional on available time. Wenn introduces that relationship; wann asks for a time in a direct or indirect question.
Keep the final verb finite
Instead ofwenn du müde sein
For this meaningwenn du müde bist
The dependent clause still needs a finite verb agreeing with its subject. Du requires bist; final placement is not a reason to use the infinitive sein.
Preserve the fronted clause structure
Instead ofWenn du kommst, ich bin hier.
For this meaningWenn du kommst, bin ich hier.
The complete condition occupies the opening position. The finite main verb bin follows it directly, and then the subject ich appears.
From understanding to using
Make your own example.
Try these without answer choices. Say your answer aloud or write it below, then compare your reasoning with the model.
Your turn 1
Say that you will come tomorrow if you have time, then ask when your friend is coming.
Compare with a model
Ich komme morgen, wenn ich Zeit habe. Wann kommst du?
I will come tomorrow if I have time. When are you coming?
The first sentence states a future plan with present forms and an explicit time word. Wenn makes it conditional. The separate wann question asks for the time of the other person’s visit, so the two connectors serve different purposes.
- Use wenn for the condition.
- End the condition with habe.
- Use wann for the time question.
Your turn 2
Start with the condition that your friend can come, then ask them to call you.
Compare with a model
Wenn du kommen kannst, ruf mich an.
If you can come, call me.
The condition contains an infinitive plus the final finite modal kannst. The main clause is a familiar singular instruction with the separable verb anrufen. Its prefix an closes the instruction, while mich is the person to call.
- End the condition with kannst.
- Use ruf for the familiar instruction.
- Keep an at the end.
Put it into practice
Make the next choice.
Choose a response and learn why it works. Your score reflects your first answer to each question. You can revisit anything you miss.
Choose an answer, then open the explanation to check your reasoning.
Question 1
Your visit depends on having time.
- Ich komme, wenn ich Zeit habe.
- Ich komme, wann ich Zeit habe.
Check the answer
Answer: Ich komme, wenn ich Zeit habe.
Ich komme, wenn ich Zeit habe.: Wenn introduces the condition.
Ich komme, wann ich Zeit habe.: Wann asks about a time and is not the connector for this condition.
Question 2
Ask your friend for the time of their visit.
- Wenn kommst du?
- Wann kommst du?
Check the answer
Answer: Wann kommst du?
Wenn kommst du?: Wenn does not introduce this direct information question.
Wann kommst du?: Wann is the question word for time.
Question 3
Complete a condition about one friend being tired.
- wenn du müde bist
- wenn du bist müde
Check the answer
Answer: wenn du müde bist
wenn du müde bist: The finite bist ends the dependent clause.
wenn du bist müde: This is main clause order rather than the target dependent clause order.
Question 4
The condition subject is one bus.
- wenn der Bus kommen
- wenn der Bus kommt
Check the answer
Answer: wenn der Bus kommt
wenn der Bus kommen: The final position does not turn the verb into an infinitive.
wenn der Bus kommt: Der Bus is singular and takes kommt.
Question 5
Start with the condition.
- Wenn ich Zeit habe, komme ich.
- Wenn ich Zeit habe, ich komme.
Check the answer
Answer: Wenn ich Zeit habe, komme ich.
Wenn ich Zeit habe, komme ich.: The main finite verb follows the fronted clause.
Wenn ich Zeit habe, ich komme.: The subject is incorrectly inserted before the main verb.
Question 6
The speaker does not know the arrival time.
- Ich weiß nicht, wenn er kommt.
- Ich weiß nicht, wann er kommt.
Check the answer
Answer: Ich weiß nicht, wann er kommt.
Ich weiß nicht, wenn er kommt.: Wenn would introduce a different relationship and does not express the intended unknown time here.
Ich weiß nicht, wann er kommt.: Wann preserves the indirect time question.
Question 7
The speaker does not know whether any visit will occur.
- Ich weiß nicht, ob er kommt.
- Ich weiß nicht, wann er kommt.
Check the answer
Answer: Ich weiß nicht, ob er kommt.
Ich weiß nicht, ob er kommt.: Ob introduces the uncertain yes or no issue.
Ich weiß nicht, wann er kommt.: Wann asks about timing and does not express the same uncertainty.
Question 8
Give having time as an established reason, rather than a condition.
- Ich komme, wenn ich Zeit habe.
- Ich komme, weil ich Zeit habe.
Check the answer
Answer: Ich komme, weil ich Zeit habe.
Ich komme, wenn ich Zeit habe.: Wenn leaves the visit dependent on the condition.
Ich komme, weil ich Zeit habe.: Weil presents available time as the reason.
Question 9
A habitual action happens whenever you are tired.
- Wenn ich müde bin, trinke ich Wasser.
- Wann ich müde bin, trinke ich Wasser.
Check the answer
Answer: Wenn ich müde bin, trinke ich Wasser.
Wenn ich müde bin, trinke ich Wasser.: Wenn introduces the repeated situation.
Wann ich müde bin, trinke ich Wasser.: Wann is not the ordinary connector for this habitual temporal clause.
Question 10
Build the condition if you can come.
- wenn du kannst kommen
- wenn du kommen kannst
Check the answer
Answer: wenn du kommen kannst
wenn du kannst kommen: The modal is too early for this dependent clause.
wenn du kommen kannst: The finite modal follows the infinitive.
Question 11
You can visit only if work is not required.
- Ich komme, wenn ich nicht arbeiten muss.
- Ich komme, wenn ich arbeiten muss.
Check the answer
Answer: Ich komme, wenn ich nicht arbeiten muss.
Ich komme, wenn ich nicht arbeiten muss.: The negative condition matches the absence of a work obligation.
Ich komme, wenn ich arbeiten muss.: This reverses the condition and requires work instead.
Question 12
Give no available time as the condition.
- wenn ich kein Zeit habe
- wenn ich keine Zeit habe
Check the answer
Answer: wenn ich keine Zeit habe
wenn ich kein Zeit habe: Kein has the wrong form for this feminine noun.
wenn ich keine Zeit habe: Zeit is feminine, so the accusative determiner is keine.
Question 13
Offer help if you have time.
- Wenn ich Zeit habe, helfe ich dir.
- Wenn ich Zeit habe, helfe ich dich.
Check the answer
Answer: Wenn ich Zeit habe, helfe ich dir.
Wenn ich Zeit habe, helfe ich dir.: Helfen takes a dative recipient, dir.
Wenn ich Zeit habe, helfe ich dich.: Dich is accusative and does not fit helfen.
Question 14
Place a completed reading event inside the condition.
- wenn du hast das Buch gelesen
- wenn du das Buch gelesen hast
Check the answer
Answer: wenn du das Buch gelesen hast
wenn du hast das Buch gelesen: This keeps the auxiliary in main clause position.
wenn du das Buch gelesen hast: The finite perfect auxiliary ends the condition.
Keep the conversation going
What to practice next
Use one new example in a sentence of your own. Then revisit the challenge without looking at the explanation.
Sources and editorial notes
By Loquus ·
Source checked with AI assistance
Explanations and examples were checked against inspected sources with AI assistance. No independent human language certification is claimed.
- University of Texas Grimm Grammar: Subordinating conjunctions
- University of Texas Grimm Grammar: Present regular verbs
- University of Texas Grimm Grammar: Time adverbs
- University of Texas Grimm Grammar: Haben
- University of Texas Grimm Grammar: Word order
- University of Texas Grimm Grammar: Sein
- University of Texas Grimm Grammar: Accusative
- University of Texas Grimm Grammar: Possessive determiners in nominative
- University of Texas Grimm Grammar: Question words
- University of Texas Grimm Grammar: Negation
- University of Texas Grimm Grammar: War
- University of Texas Grimm Grammar: Modal verbs
- University of Texas Grimm Grammar: Imperative
- University of Texas Grimm Grammar: Separable verbs
- University of Texas Grimm Grammar: Perfect tense overview
- University of Texas Grimm Grammar: Irregular participles with haben
- University of Texas Grimm Grammar: Dative pronouns
Learning research behind the practice
Worked examples, retrieval practice, and later review inform the activities. These studies do not establish the effectiveness of this specific lesson.