又不 / 又没【yòu bù / yòu méi】

又 in front of 不 or 没 strengthens the negative. The speaker is rejecting something the other person assumed, usually as a reason: "it's not as if…, so…". It is spoken and can sound impatient.

The reason clause with 又 can come first or second. Either way, the other clause is what follows from it.

又不 negates a state, a habit or what someone is; 又没 negates something that did or didn't happen, the same split as plain 不 and 没.

Emphasis or "again"

又 also means "again" for things that have happened. 他又没来 can be either "he didn't come again" or "he didn't even come". Context decides: the emphatic one is giving a reason for something else.

Where it goes wrong

又 always comes before the negative word.

• × 我不又是你妈妈 → 我又不是你妈妈
• × 外面不又冷 → 外面又不冷