German Subordinate Clauses with *weil* and *dass*

In Brief

The conjunctions weil (“because”) and dass (“that”) introduce a subordinate clause, and its conjugated verb normally goes to the end: Ich bleibe zu Hause, weil ich krank bin. Use weil to give a reason and dass to introduce a fact, thought, statement, or perception. Separate the clauses with a comma.

Overview

A subordinate clause is a group of words that contains a subject and a verb but depends on another clause for its role in the sentence. In German, weil and dass make this relationship visible through word order: the conjugated verb (the verb form changed to agree with the subject, such as bin, kommt, or haben) moves to the end of that clause.

This is an important A2 step beyond ordinary main-clause word order. In a main clause, the conjugated verb normally occupies the second position: Er kommt heute. After dass, the same information becomes dass er heute kommt. English does not make this change: “He is ill” and “because he is ill” keep the same basic order. That makes English word order a tempting but unreliable guide for German.

The two conjunctions do different jobs. Weil answers “why?” and presents a reason. Dass connects a statement or idea to expressions such as “I know,” “she says,” “we hope,” or “it is important.” Both follow the same core verb-final pattern.

How It Works

The beginner rule: conjunction first, conjugated verb last

Start with a main clause, add weil or dass, then place the conjugated verb at the end of the subordinate clause.

Clause type	Pattern	Example
Main clause	subject + conjugated verb + other information	Ich bin krank.
weil clause	weil + subject + other information + conjugated verb	weil ich krank bin
dass clause	dass + subject + other information + conjugated verb	dass ich krank bin

A subordinate clause may follow the main clause:

Ich gehe früh ins Bett, weil ich morgen arbeiten muss.
“I am going to bed early because I have to work tomorrow.”

It may also come first:

Weil ich morgen arbeiten muss, gehe ich früh ins Bett.

When the subordinate clause comes first, the whole clause fills the first position of the sentence. The main-clause verb therefore follows immediately: gehe ich, not ich gehe. A useful pattern is:

subordinate clause + comma + conjugated main verb + subject + ...

Using weil for reasons

Weil means “because” and introduces the cause or explanation for something.

• Wir nehmen den Bus, weil es regnet. — We are taking the bus because it is raining.
• Weil der Laden schon geschlossen ist, kommen wir morgen wieder. — Because the shop is already closed, we will come back tomorrow.

Do not confuse weil with denn, another word meaning “because.” Denn joins two main clauses and does not send the verb to the end.

Connector	Word order	Example
weil	subordinate clause: verb at end	Ich fahre nicht, weil ich müde bin.
denn	main-clause order: verb second	Ich fahre nicht, denn ich bin müde.

The meaning is often very similar. Weil is extremely common in everyday explanations; denn can sound somewhat more written or deliberate, though it also occurs in speech.

Using dass for statements and ideas

Dass usually corresponds to English “that.” It introduces the content of a thought, statement, feeling, discovery, or judgment—what someone knows, says, hopes, notices, or considers important.

Common frames include:

• Ich weiß, dass ... — I know that ...
• Sie sagt, dass ... — She says that ...
• Wir hoffen, dass ... — We hope that ...
• Er glaubt, dass ... — He believes that ...
• Es ist wichtig, dass ... — It is important that ...
• Ich freue mich, dass ... — I am glad that ...

English can often omit “that”: “I think he is right.” Beginner German normally keeps dass and uses verb-final order: Ich glaube, dass er recht hat.

Do not confuse the conjunction dass with the article or pronoun das. The conjunction always has double s and introduces a clause:

• Das Buch ist interessant. — The book is interesting.
• Ich finde, dass das Buch interessant ist. — I think that the book is interesting.

Punctuation

German places a comma between the main clause and the subordinate clause. This is required whether the subordinate clause comes first or second.

• Ich weiß, dass er kommt.
• Dass er kommt, weiß ich schon.
• Weil ich krank bin, bleibe ich zu Hause.

In a sentence with two subordinate clauses, commas also show their boundaries: Ich glaube, dass sie zu Hause bleibt, weil sie krank ist.

More than one verb

The simple rule is that the conjugated verb goes to the end. Other verb forms usually stand immediately before it.

Construction	Main clause	Subordinate clause
Modal + infinitive	Er muss heute arbeiten.	..., weil er heute arbeiten muss.
Perfect tense	Sie hat das Buch gelesen.	..., dass sie das Buch gelesen hat.
Passive	Das Essen wird vorbereitet.	..., weil das Essen vorbereitet wird.
Future	Er wird später anrufen.	..., dass er später anrufen wird.

An infinitive is the dictionary form of a verb, such as arbeiten. A participle is a verb form used to build a tense or passive, such as gelesen in hat gelesen. In the usual subordinate pattern, these unchanged forms come before the final conjugated verb.

Separable verbs

In a main clause, the prefix of a separable verb moves to the end: Der Zug kommt um acht Uhr an. In a subordinate clause, the conjugated verb itself is already at the end, so the prefix and verb stay together: Ich weiß, dass der Zug um acht Uhr ankommt.

• Sie steht früh auf. → ..., weil sie früh aufsteht.
• Er ruft mich an. → ..., dass er mich anruft.

Examples in Context

German	English	Note
Ich bleibe zu Hause, weil ich krank bin.	I am staying home because I am ill.	weil gives the reason; bin is final.
Weil der Zug Verspätung hat, kommen wir später an.	Because the train is delayed, we will arrive later.	The opening clause is followed by kommen wir.
Mara lernt Deutsch, weil sie in Berlin arbeitet.	Mara is learning German because she works in Berlin.	Present-tense verb at the end.
Wir gehen zu Fuß, weil kein Bus mehr fährt.	We are walking because there are no more buses running.	The subject is kein Bus; fährt is final.
Ich kann nicht mitkommen, weil ich noch arbeiten muss.	I cannot come along because I still have to work.	The infinitive arbeiten precedes the modal muss.
Er ist müde, weil er schlecht geschlafen hat.	He is tired because he slept badly.	Perfect participle geschlafen before hat.
Ich weiß, dass er kommt.	I know that he is coming.	Basic dass clause.
Es ist gut, dass du hier bist.	It is good that you are here.	dass gives the content of the judgment.
Sie sagt, dass die Besprechung um zehn beginnt.	She says that the meeting starts at ten.	beginnt moves to the end.
Wir hoffen, dass ihr morgen Zeit habt.	We hope that you have time tomorrow.	The verb agrees with plural ihr.
Ich glaube, dass Anna schon angekommen ist.	I think that Anna has already arrived.	Perfect participle before final ist.
Dass du uns hilfst, finde ich sehr nett.	I think it is very kind that you are helping us.	The dass clause occupies the first position.
Ich habe gehört, dass der Supermarkt sonntags geschlossen ist.	I heard that the supermarket is closed on Sundays.	A reported fact.
Wir bleiben drinnen, weil es regnet und sehr kalt ist.	We are staying inside because it is raining and very cold.	Two predicates share the same subject.

Common Mistakes

Keeping English-style word order

• Wrong: Ich bleibe zu Hause, weil ich bin krank.
• Right: Ich bleibe zu Hause, weil ich krank bin.
• Why: Weil introduces a subordinate clause, so the conjugated verb bin belongs at the end.

Using verb-final order after denn

• Wrong: Ich bleibe zu Hause, denn ich krank bin.
• Right: Ich bleibe zu Hause, denn ich bin krank.
• Why: Denn joins main clauses and keeps the conjugated verb in second position. Use weil ich krank bin if you want subordinate-clause order.

Forgetting inversion after an opening subordinate clause

• Wrong: Weil ich müde bin, ich gehe ins Bett.
• Right: Weil ich müde bin, gehe ich ins Bett.
• Why: The entire weil clause occupies position one. The main-clause verb gehe must come next.

Writing das instead of dass

• Wrong: Ich weiß, das er heute arbeitet.
• Right: Ich weiß, dass er heute arbeitet.
• Why: Dass with double s is the conjunction “that.” Das is usually an article or pronoun: das Haus, Das ist gut.

Splitting a separable verb

• Wrong: Ich weiß, dass der Zug um acht Uhr kommt an.
• Right: Ich weiß, dass der Zug um acht Uhr ankommt.
• Why: In a subordinate clause, a separable verb remains together at the end.

Putting the finite verb before the participle or infinitive

• Wrong: Sie sagt, dass sie hat das Buch gelesen.
• Right: Sie sagt, dass sie das Buch gelesen hat.
• Why: In the regular pattern, the participle or infinitive precedes the final conjugated auxiliary or modal.

Usage Notes

In speech, the reason is often more important than the statement it explains, so an opening weil clause is natural: Weil ich morgen früh rausmuss, gehe ich jetzt. In neutral writing, both clause orders are standard; choose the order that makes the information flow clearly.

A dass clause can fill several roles in a larger sentence. You do not need the labels to use it correctly, but it helps to recognize that the clause can be “the thing” someone knows (Ich weiß, dass ...) or the subject of a judgment (Es ist schade, dass ...). German often uses the placeholder es in the second pattern.

After hoffen, glauben, denken, and similar verbs, dass is natural and safe. In some contexts German also uses an infinitive construction with zu, especially when the understood subject is the same: Ich hoffe, bald zu kommen (“I hope to come soon”). When the subjects differ, a dass clause is normally clearer: Ich hoffe, dass du bald kommst.

Beyond the Basics: Advanced Use

You do not need to master the following points at A2, but you will encounter them as your German develops.

Omitting dass

German can report thoughts or speech without dass. When dass disappears, ordinary main-clause word order returns:

• Ich glaube, dass er heute kommt.
• Ich glaube, er kommt heute.

Both can mean “I think he is coming today.” The version without dass is common, particularly after verbs of saying and thinking, but it is not formed by simply deleting dass: the word order must change too.

Spoken weil with verb-second order

In informal conversation, native speakers sometimes use weil followed by main-clause word order, especially when the reason is added as a separate afterthought: Ich gehe jetzt, weil ich bin wirklich müde. This is widespread in spontaneous speech, but verb-final weil ich wirklich müde bin remains the standard form and is the right model for learners, formal speech, and writing.

Complex verb clusters

Most subordinate verb groups follow the patterns shown earlier. One important advanced exception occurs with certain perfect constructions containing a modal and an ersatzinfinitiv (a replacement infinitive):

• Main clause: Er hat arbeiten müssen.
• Subordinate clause: ..., weil er hat arbeiten müssen.

Here the finite auxiliary hat comes before the two infinitives rather than at the absolute end. Similar ordering can occur with verbs such as lassen, sehen, and hören in particular perfect constructions. Treat this as a later exception; it does not change the reliable A2 rule for ordinary clauses such as weil er arbeiten muss or weil er gearbeitet hat.

Several subordinate clauses

Clauses can be nested or coordinated:

• Ich weiß, dass sie zu Hause bleibt, weil sie krank ist.
• Er sagt, dass er kommt und dass er einen Freund mitbringt.

Track each conjunction separately. Every dass or weil opens its own clause, and each clause has its own final verb or verb group.

Practice Tips

1. Transform pairs aloud. Say a main clause such as Er ist müde, then add a frame: Ich sehe, dass er müde ist or Er schläft, weil er müde ist. This builds the habit of holding the conjugated verb until the end.
2. Mark three anchors. In each sentence, underline the conjunction, circle the subject, and box the final conjugated verb. Then check the comma. This is especially useful with perfect tenses and modal verbs.
3. Practice both clause orders. Rewrite Ich nehme einen Regenschirm mit, weil es regnet as Weil es regnet, nehme ich einen Regenschirm mit. Notice both changes: the subordinate verb remains final, while the main verb moves before the subject.

Related Concepts

• Prerequisite: Word Order in the Main Clause — provides the verb-second pattern that subordinate clauses contrast with.
• Next step: Subordinate Clauses with wenn and ob — applies verb-final order to conditions, repeated events, and indirect yes/no questions.
• Later connection: Relative Clauses — adds dependent descriptions with relative pronouns and verb-final order.
• Later connection: Concessive Clauses with obwohl and trotzdem — contrasts subordinate obwohl with main-clause connector trotzdem.
• Advanced development: Advanced Sentence Connectors — expands the range of relationships between clauses and registers.