英文中的否定句，一共有三种情况：部分否定，完全否定，和 表面否定实际表肯定。
一、部分否定
代词或副词如 all, both, every, everybody, everything，everywhere, always 等与not搭配使用时，表示部分否定，表示"并非都是，不是每个都是"等。
1.Not all of the schools have swimming pools.
不是所有的学校都有泳池。
2.Not every dream will be realized.
并非每个梦想都能成真。
3.Both the women were not French.
这两位女士不都是法国人。
4.He is not always here.
他并不总在这儿。
5.I dont drop litter everywhere.
我不到处乱扔垃圾。
二、完全否定
通过使用 no, none, nobody, nothing, nowhere, neither, never 等构成。
1.He told me all the news but none of it was very exciting.
他告诉了我所有的消息，但没有一条让人兴奋。
2.No body knows who first invented the umbrella.
没有人知道谁最先发明了雨伞。
3.At that time, there were no supermarkets.
那时没有超市。
4.A smile costs nothing, but gives much.
微笑不费分文，受者得益良多。
5.Im going no· where until you are back.
你回来之前我哪儿都不去。
6.Now neither of my parents give me money.
现在，父母都不给我钱了。
7.Never have I heard anything like it!
我从未听说过这样的事！
三、表面否定，实际表肯定
1.never… without doing
每……必
He never goes to the store without buying something to eat.
他每次到这个商店都要买些吃的。
2.cannot ... too / over
越…越好；再…也不嫌过分：
One cannot be too careful in choosing friends.
择友越谨慎越好。
3.no more ... than
同…一样不：
I could no more do that than you.
你不能做那件事，我也不能做。
4.nothing but 只有；仅仅：
Sam could do nothing but admit to his teacher that he was wrong.
Sam只能向老师承认自己错了。
5.anything but
根本不；除…以外的任何事物：
Maria is anything but stupid!
玛利亚才不笨呢！
6.more A than B
是A不是B:
He is more brave than wise.
他有勇无谋。
7.There is no smoke without fire.
无风不起浪。
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