省略to的动词不定式(3页).doc

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1、-第 1 页省略 to 的动词不定式-第 2 页大家都知道在动词不定式 to do 中，“to”是不定式的标志，有了这个 to，后面所跟的动词该用原形。但是 to 也有可以省略的时候，这个时候虽然没有了 to，后面所跟的动词依然用原形。今天的每日一课就给大家总结一些省略 to 的动词不定式。1、情态动词（除 ought 外）后的 to 已省略。例：You must go to the hospital first.你必须先去医院。I can swim well.我能游得很好。2、使役动词 let,have,make 后，感官动词 see,watch,look at,notice,observe

2、,hear,listen to,smell,feel,find 等词后的 to 省略。例：He made the baby crying all night long.他让那个婴儿哭了一整夜。Let it be.就这样吧。when I passed by,I saw the girl picking the flowers.我经过的时候，看见那个女孩在摘花。注意：在这些词的用法中，用于被动语态时不能省去 to。例：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

3、夜干活。=They were made to work the whole night.3、would rather/had better 后的 to 省略。例：I would rather go to Japan than the USA.我宁愿去日本也不想去美国。You had better take a hat with you.你最好带上一顶帽子。4、why/why not句型中 not 后 to 省略。例：why not come to my home for a dinner tonight?今晚何不来我家吃顿饭。5、help 后可带 to，也可不带 to,help sb（to）d

4、o 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：例：He forgot to go to her home and give her the important letter.他忘了去她家并把一封重要的信件给她。8、通常在 discover,i

5、magine,suppose,think 等词后作宾补时，可以省去 to be。例：He is supposed（to be）nice.他应该是个好人。9、but 作介词，后结不定式结构时，前面谓语动词部分若含有 do 的形式时，but后的不定式要省去 to,否则要带 to.例 he wants to do nothing but go out.-第 3 页He wants to believe anything but to take the medicine.10、当两个或多个不定式短语由连词 and,but 或 or 连接时，后一个或几个不定式符号 to 常可省去。但若表示对比、对照关系

6、时，则不能省略。例 he wants to move to France and marry the girl.The purpose of new technologies is to make life easier,not to make it moredifficult.11、不定式做表语时，一般要带 to,但若主语部分中含有 do 的各种形式时，符号to 可省去。例 weve missed the last bus.All we could do now is walk home.典型例题1）-I usually go there by train.-Why not _ by boat for a change?A.to try goingB.trying to goC.to try and goD.try going答案：D.why not 后面接不带 to 的不定式，因此选 D。2）Paul doesnt have to be made _.He always works hard.A.learnB.to learnC.learnedD.learning答案：B.make 后接不带 to 的动词不定式，当其用于被动时，to 不可省略。