摘要: 省去to 的动词不定式 1) 情态动词 后. 2) 使役动词 let, have, make后.感官动词 see, watch, look at, notice , observe, hear, listen to, smell, feel, find 等后. 注意:被动语态中不能省去to.例如: I saw him dance. 我看见他跳舞. =He was seen to dance. The boss made them work the whole night. 老板让他们整夜干活. =They were made to work the whole night. 3) would rather.had better句型后 4) Why- / why no-句型后 5) help 后可带to.也可不带to, help sb (to) do sth: 6) but和except后.but前是实义动词do时.后面出现的不定式不带to. 比较:He wants to do nothing but go out. 他只想出去玩. He wants to believe anything but to take the medicine. 除了吃这药.他什么都信. 7) 由and, or和than连接的两个不定式.第二个to 可以省去: 8) 通常在discover, imagine, suppose, think等词后作宾补时.可以省去to be.例如: He is supposed nice. 他应该是个好人.

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