Subordinate Clauses with wenn and ob in German

In Brief

Use wenn for “if” and for “when/whenever” in repeated or present/future situations. Use ob for “whether” in an indirect yes/no question. Both introduce a subordinate clause (a dependent part of a larger sentence), so its conjugated verb goes at the end: Wenn ich Zeit habe, komme ich; Ich weiß nicht, ob er kommt.

Overview

At A2, wenn and ob let you connect ideas that would otherwise require several short sentences. With wenn, you can state a condition—Wenn es regnet, bleiben wir hier (“If it rains, we’ll stay here”)—or say when something happens. With ob, you can report uncertainty or put a yes/no question inside another sentence: Ich weiß nicht, ob er kommt (“I don’t know whether he is coming”).

Both words are subordinating conjunctions (linking words that introduce a dependent clause). Their clauses follow the same basic word-order rule already used after weil and dass: the finite verb (the verb form that changes for the subject or tense) comes last. English does not make this change, so English-speaking learners need to build a new habit: think of wenn or ob as a signal to hold the finite verb until the end of that clause.

The meanings require equal attention. English if can introduce either a condition or an indirect question, but German normally makes the distinction explicit: conditional wenn, question-like ob. Learning to ask “condition or hidden yes/no question?” prevents one of the most frequent mistakes with these conjunctions.

How It Works

The basic subordinate-clause pattern

The simplest pattern is:

wenn/ob + subject + other information + finite verb

German	English	Note
wenn ich heute Zeit habe	if/when I have time today	habe is finite and comes last
ob der Laden noch offen ist	whether the shop is still open	In the two-part predicate offen ist, finite ist is last

A comma separates the subordinate clause from the main clause. This is required in German, even when English punctuation would not use a comma.

The two clauses can appear in either order:

• Main clause first: Ich komme, wenn ich Zeit habe.
• Subordinate clause first: Wenn ich Zeit habe, komme ich.

When the subordinate clause comes first, the whole clause occupies the first position of the sentence. The finite verb of the following main clause must therefore come immediately after the comma: Wenn ich Zeit habe, komme ich. Do not add another word before that verb.

When the verb has more than one part

In a subordinate clause, the finite part goes at the very end. Other verb parts appear before it.

German	English	Verb pattern
wenn der Zug spät ankommt	if the train arrives late	A separable verb stays joined: ankommt
ob du morgen kommen kannst	whether you can come tomorrow	Infinitive kommen + finite modal kannst
wenn sie das Buch gelesen hat	when/if she has read the book	Participle gelesen + finite auxiliary hat
ob er schon gegangen ist	whether he has already left	Participle gegangen + finite auxiliary ist

Compare the main clause Der Zug kommt spät an with the subordinate clause wenn der Zug spät ankommt. The prefix is not left behind in the subordinate clause.

Using wenn for conditions

Use wenn when one event depends on a condition:

• Wenn du möchtest, können wir später gehen. — “If you like, we can go later.”
• Ich helfe dir, wenn ich kann. — “I’ll help you if I can.”

German often uses the present tense in both clauses for a real future possibility. English may use “will” in the main clause, but German does not need werden: Wenn ich Zeit habe, komme ich morgen can naturally mean “If I have time, I’ll come tomorrow.”

The result clause may also be a command or a question:

• Wenn du angekommen bist, ruf mich an. — “When you’ve arrived, call me.”
• Was machst du, wenn der Bus nicht kommt? — “What will you do if the bus doesn’t come?”

Using wenn for time

Use wenn for present or future “when,” and for repeated events in any time period. In repeated situations, English whenever often captures the meaning well.

• Wenn ich nach Hause komme, esse ich zuerst etwas. — “When I get home, I eat something first.”
• Wenn wir früher bei Oma waren, gab es immer Kuchen. — “Whenever we were at Grandma’s in the past, there was always cake.”

For a single completed event in the past, German normally uses als, not wenn: Als ich gestern nach Hause kam, war niemand da (“When I came home yesterday, nobody was there”). This contrast belongs more fully to temporal clauses, but it is important even at A2: repeated past event = often wenn; one particular past event = als.

Using ob for indirect yes/no questions

A direct yes/no question can be answered with ja or nein:

• Direct: Kommt Lara heute? — “Is Lara coming today?”
• Indirect: Weißt du, ob Lara heute kommt? — “Do you know whether Lara is coming today?”

In the indirect version, ob replaces question word order and sends the verb to the end. The full sentence may be a statement even though it contains an indirect question:

• Ich frage mich, ob Lara heute kommt. — “I wonder whether Lara is coming today.”
• Es ist noch unklar, ob Lara heute kommt. — “It is still unclear whether Lara is coming today.”

Common expressions before an ob clause include wissen (“know”), fragen (“ask”), sich fragen (“wonder”), prüfen (“check”), entscheiden (“decide”), and nicht sicher sein (“not be sure”).

Choosing between wenn and ob

English if is not enough to choose the German word. Test the meaning instead.

German	English	Meaning
Sag mir Bescheid, wenn du kommst.	Let me know if/when you are coming.	Your coming is the time or condition for telling me
Sag mir Bescheid, ob du kommst.	Let me know whether you are coming.	Tell me yes or no
Ich kaufe es, wenn es billig ist.	I’ll buy it if it is cheap.	Condition
Ich weiß nicht, ob es billig ist.	I don’t know if/whether it is cheap.	Indirect yes/no question

A useful diagnostic is to replace English “if” with whether or not. If the result keeps the intended meaning, use ob. If the clause states the condition under which something happens, use wenn.

Examples in Context

German	English	Note
Wenn ich Zeit habe, komme ich.	If I have time, I will come.	Real condition; subordinate clause first
Ich rufe dich an, wenn ich fertig bin.	I’ll call you when I’m finished.	Future time; German present tense
Wenn es regnet, bleiben wir hier.	If it rains, we’ll stay here.	Condition and result
Wenn Paul Kaffee trinkt, kann er nicht schlafen.	When Paul drinks coffee, he cannot sleep.	Repeated consequence
Wenn wir früher Urlaub hatten, fuhren wir ans Meer.	Whenever we had vacation in the past, we went to the sea.	Repeated past event
Wenn du am Bahnhof ankommst, schreib mir bitte.	When you arrive at the station, please message me.	Separable verb remains joined
Ich weiß nicht, ob er kommt.	I don’t know whether he is coming.	Indirect yes/no question
Kannst du prüfen, ob die Tür geschlossen ist?	Can you check whether the door is closed?	Embedded inside a direct question
Sie fragt, ob wir morgen arbeiten müssen.	She is asking whether we have to work tomorrow.	Modal verb at the end
Wir sind nicht sicher, ob der Zug schon abgefahren ist.	We are not sure whether the train has already left.	Perfect tense in an ob clause
Es hängt davon ab, ob das Hotel noch Zimmer hat.	It depends on whether the hotel still has rooms.	Common expression: davon abhängen
Sag mir bitte, ob du Tee oder Kaffee möchtest.	Please tell me whether you would like tea or coffee.	Alternatives with oder

Common Mistakes

Using ob for a condition

• Wrong: Ob es regnet, bleiben wir zu Hause.
• Right: Wenn es regnet, bleiben wir zu Hause.
• Why: Staying home depends on a condition. Ob introduces uncertainty about a yes/no answer; it does not normally mean conditional “if.”

Using wenn for “whether”

• Wrong: Ich weiß nicht, wenn der Laden offen ist.
• Right: Ich weiß nicht, ob der Laden offen ist.
• Why: The hidden question is Ist der Laden offen? It has a yes/no answer, so use ob. English permits “I don’t know if,” but German distinguishes this from conditional wenn.

Keeping English word order

• Wrong: Ich frage, ob kommt der Bus pünktlich.
• Right: Ich frage, ob der Bus pünktlich kommt.
• Why: In the subordinate clause, the finite verb kommt belongs at the end.

Forgetting main-clause inversion

• Wrong: Wenn ich Zeit habe, ich komme vorbei.
• Right: Wenn ich Zeit habe, komme ich vorbei.
• Why: The opening subordinate clause fills the first position. The main-clause verb komme follows the comma immediately, before the subject ich.

Separating a separable verb

• Wrong: Ruf mich an, wenn du kommst an.
• Right: Ruf mich an, wenn du ankommst.
• Why: A separable-prefix verb such as ankommen is not split when its finite form stands at the end of a subordinate clause.

Using wenn for one specific past event

• Wrong: Wenn ich gestern im Büro ankam, war die Tür offen.
• Right: Als ich gestern im Büro ankam, war die Tür offen.
• Why: Standard German uses als for one particular completed event in the past. Use wenn for repeated past situations: Wenn ich früh ankam, war die Tür noch zu (“Whenever I arrived early, the door was still closed”).

Usage Notes

“If,” “when,” or “whenever”?

German wenn covers several meanings that English separates. Context often resolves the difference:

• Wenn du morgen kommst, essen wir zusammen. can mean “When you come tomorrow...” if the visit is expected, or “If you come tomorrow...” if it is uncertain.
• Adding immer makes repetition explicit: Immer wenn ich ihn sehe, lächelt er (“Whenever I see him, he smiles”).
• Falls is a useful alternative when you want an unmistakable condition, often with a sense of “in case” or “if it should happen”: Falls du Hilfe brauchst, ruf mich an.

Punctuation and speech

German writes a comma between the main clause and the wenn or ob clause. In speech, there is often a small pause at the same boundary, but the final verb remains the more reliable signal.

An indirect question does not automatically require a question mark. Use the punctuation of the complete sentence:

• Ich weiß nicht, ob sie da ist. — statement, so a period
• Weißt du, ob sie da ist? — direct question containing an indirect question, so a question mark

Tense follows meaning, not the conjunction

Neither wenn nor ob determines the tense. Choose the tense according to the time and meaning: ob er kommt (present), ob er gekommen ist (present perfect), ob er kommen wird (future). In everyday German, however, the present plus a clear future-time word is usually enough: Ich weiß nicht, ob er morgen kommt.

Beyond the Basics / Advanced Use

You do not need to master all of these patterns at A2, but you will meet them later.

Alternatives and paired structures

Ob ... oder ... presents alternatives, including the explicit pair “whether or not”:

• Ob wir fahren oder fliegen, entscheiden wir morgen. — “Whether we drive or fly, we’ll decide tomorrow.”
• Ich gehe spazieren, ob es regnet oder nicht. — “I’m going for a walk whether it rains or not.”

In the second example, the ob clause is no longer simply the object of “know” or “ask”; the whole construction means that the result is unaffected by either possibility.

als ob: “as if”

The fixed conjunction als ob means “as if” and also sends the finite verb to the end: Er tut so, als ob er alles wüsste (“He acts as if he knew everything”). This pattern commonly uses Konjunktiv II (a verb form used for unreal or hypothetical ideas), so it is best treated as a later topic rather than as an ordinary A2 use of ob.

Real and hypothetical conditions

At A2, wenn usually introduces an open or realistic condition: Wenn ich genug Geld habe, kaufe ich das Fahrrad. Later, you will combine it with Konjunktiv II for imagined or unlikely situations: Wenn ich genug Geld hätte, würde ich das Fahrrad kaufen (“If I had enough money, I would buy the bicycle”). The conjunction and verb-final rule stay the same; the verb forms show that the situation is hypothetical.

Omitting wenn in formal or concise conditions

German can sometimes express a condition without wenn by placing the finite verb first: Hast du Fragen, melde dich (“If you have questions, get in touch”). This is concise and common in instructions, notices, and more formal writing. For everyday A2 production, a full wenn clause is the safer pattern: Wenn du Fragen hast, melde dich.

Practice Tips

1. Sort English “if” sentences by meaning. Label each one “condition” or “yes/no uncertainty,” then translate with wenn or ob. For example, compare “I’ll go if she comes” with “I don’t know if she’s coming.”
2. Build sentences from the end backward. Say the final verb first in your planning: ... Zeit habe; then add wenn ich: wenn ich Zeit habe. This trains verb-final order rather than relying on English order.
3. Practise clause swapping. Turn Ich bleibe zu Hause, wenn es regnet into Wenn es regnet, bleibe ich zu Hause. Check both the final verb in the subordinate clause and the verb immediately after the comma in the main clause.

Related Concepts

• Prerequisite: Subordinate Clauses with weil and dass — introduces the same verb-final subordinate-clause pattern.
• Next step: Temporal Subordinate Clauses — expands time clauses with als, bevor, nachdem, während, bis, seit, and sobald.