英语中部分否定的表示方法：not…and的否定式

高考网

　　英语中的部分否定（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后面的那一部分。 例如：
　　He did not speak clearly and correctly. 他讲得清楚但不正确。
　　This film is not interesting and instructive. 这部电影有趣但无教育意义。
　　She cannot sing and dance. 她会唱歌但不会跳舞。
　　如果将and 换成or，not 对其后面的两部分就全盘否定了。
　　He did not speak clearly or correctly. 他讲的既不清楚也不正确。
　　如要对上述的all, both, every, always, 以及entirely, altogether, completely, quite 和 all the time 等词作完全否定，那就分别要用与之相对应的全否定词，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.