Nachdem wir uns beeilt hatten, konnten wir den Vertrag rechtzeitig unterschreiben.

Questions & Answers about Nachdem wir uns beeilt hatten, konnten wir den Vertrag rechtzeitig unterschreiben.

Why is the past perfect tense (Plusquamperfekt) used in the first clause, and how is it formed here?
The Plusquamperfekt (past perfect) shows an action that was completed before another past action. It’s formed with the simple-past auxiliary hatten (from haben) plus the past participle beeilt. Hence wir hatten uns beeilt means “we had hurried.”
Why does the finite verb hatten appear at the very end of the Nachdem clause?
Because Nachdem is a subordinating conjunction in German. Subordinate clauses send the finite verb to the end, so you get Nachdem wir uns beeilt hatten… (subject + reflexive pronoun + participle + auxiliary).
Why is sich beeilen reflexive, and why do we say uns beeilt instead of just beeilt?
The verb beeilen always requires a reflexive pronoun: you hurry yourself (“einen Weg nehmen”), so wir beeilen uns. In the past perfect you keep the reflexive pronoun in the same case: wir hatten uns beeilt.
Why do we invert subject and verb in the main clause (“konnten wir”)?
When a subordinate clause comes first, the following main clause requires inversion: the finite verb precedes the subject. That’s why it’s konnten wir instead of wir konnten.
Why is den Vertrag in the accusative case?
Because unterschreiben is a transitive verb that takes a direct object. In German direct objects are in the accusative, so der Vertrag becomes den Vertrag.
What role does rechtzeitig play, and why is it placed before the verb?
Rechtzeitig is an adverb meaning “in time” or “timely.” In German sentence structure, adverbs of manner/time often occupy the “middle field” before the main verb or its objects, here coming right before unterschreiben.
Could we express the second clause in the Perfekt instead of the Präteritum?

Yes. You’d say:
Nachdem wir uns beeilt hatten, haben wir den Vertrag rechtzeitig unterschreiben können.
With modal verbs in Perfekt, the main infinitive (unterschreiben) and the modal infinitive (können) both go to the end.

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How do German cases work?
German has four grammatical cases: nominative (subject), accusative (direct object), dative (indirect object), and genitive (possession). The case determines the form of articles and adjectives. For example, "the dog" is "der Hund" as a subject but "den Hund" as a direct object.

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