adv. 副词不；[用以表示否定、否认、拒绝、禁止等]不是；几乎不；未必，没有[用于否定后面的词或短语]
She is not happy today.
她今天不高兴。
I do not like broccoli.
我不喜欢西兰花。
He is not coming with us.
他不和我们一起来。
This is not my book.
这不是我的书。
They are not friends.
他们不是朋友。
We are not ready yet.
我们还不准备好。
The dog is not barking.
狗不叫。
I am not tired.
我不累。
She does not know him.
她不认识他。
It is not raining now.
现在不下雨。
not only ... but also ...
不仅...并且...
believe it or not
信不信由你
not to mention
更不用说, 且不说
will not hear of
不允许； 不同意
not ... until ...
直到...才
