不 vs 没
Two ways to say "not", chosen by what you are negating.
不: habits, facts, wishes
Use 不 for general truths, preferences and future intentions.
。
I don't drink coffee.
。
He isn't coming tomorrow.
没: it did not happen
Use 没 (usually with 有) for things that did not occur, and for "have not".
。
I didn't go yesterday.
。
He has no money.
Remember
- 有 can only be negated with 没: 没有.
- Before a fourth-tone syllable, 不 is read as second tone: 不去 (bú qù).