MANDARIN SENTENCE PATTERN
Negation with 不 and 没
Distinguish a general negative from not having or not having done something.
不 + verb/adjective · 没(有) + verb · 没有 + noun
不 commonly negates habits, intentions, and descriptions. 没 or 没有 commonly negates an event that has not happened or a possession that does not exist.
有 is negated with 没有. These are useful starting rules; aspect and context matter more than a simple English past/present split.
Examples
我不喝咖啡。
I do not drink coffee.
我没有车。
I do not have a car.
我今天没吃早饭。
I have not had breakfast today.
Keep in mind
Use 没有 for not having something, not 不有.