German has two negation words, and choosing the right one depends on what you're negating. Use kein to negate a noun (anywhere "ein" or no article would appear); use nicht for verbs, adjectives, or nouns that already have "der/die/das".
| German | English |
|---|---|
| Ich habe kein Auto. | I do not have a car. |
| Das ist nicht mein Buch. | That is not my book. |
| Ich verstehe nicht. | I don't understand. |
How do you say "I do not have a car"?