英語中的部分否定（即不完全否定）有如下一些表示方法：
not…and…的否定式，被否定的往往是and後面的那一部分。 例如：
He did not speak clearly and correctly. 他講得清楚但不正確。
This film is not interesting and instructive. 這部電影有趣但無教育意義。
She cannot sing and dance. 她會唱歌但不會跳舞。
如果將and 換成or，not 對其後面的兩部分就全盤否定了。
He did not speak clearly or correctly. 他講的既不清楚也不正確。
如要對上述的all, both, every, always, 以及entirely, altogether, completely, quite 和 all the time 等詞作完全否定，那就分別要用與之相對應的全否定詞，如no, none, neither, no one, never, not (never)… at all 等。例如：
All of them can do it.--- None of them can do it.
Both are good.---Neither is good.
Everybody likes it. ---Nobody likes it.
He is always late. --- He is never late.
We don't trust them entirely. --- We never trust them at all.
He was here all the time. --- He was never here.
（責任編輯：賈志超）