Advanced negation positioning (nicht)

Placing nicht (not) in simple sentences is straightforward, but what happens when you add modal verbs, the perfect tense, or subordinate clauses?

Luckily, German follows a consistent pattern: nicht prefers to sit near the end of the clause, right before the main action or the specific word it is negating.

With modal verbs

When you use a modal verb, the modal takes the second position and pushes the main infinitive verb to the end of the sentence. Place nicht immediately before that infinitive.

He cannot tolerate lactose.
Er kann Laktose nicht vertragen.
I must not forget the allergy.
Ich darf die Allergie nicht vergessen.

In the perfect tense

The perfect tense works the same way. The helping verb takes the second position, and the past participle goes to the end. Place nicht right before the past participle.

I did not tolerate the milk.
Ich habe die Milch nicht vertragen.
The doctor did not notice the intolerance.
Der Arzt hat die Intoleranz nicht bemerkt.

If there is a direct object in the sentence, nicht waits until after the object, sitting right before the past participle.

He did not buy the lactose-free milk.
Er hat die laktosefreie Milch nicht gekauft.

In subordinate clauses

Subordinating conjunctions like dass (that), weil (because), and damit (so that) kick the conjugated verb to the very end of the clause.

In these clauses, nicht is placed directly before this final verb.

He knows that he does not have the allergy.
Er weiß, dass er die Allergie nicht hat.
We cook at home so that he does not get the rash.
Wir kochen zu Hause, damit er den Ausschlag nicht bekommt.

If the subordinate clause uses a predicate adjective (like allergisch or laktosefrei), nicht goes right before the adjective.

I hope that you are not allergic.
Ich hoffe, dass du nicht allergisch bist.
I know that the recipe is not lactose-free.
Ich weiß, dass das Rezept nicht laktosefrei ist.

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