[动词不定式]省去to 的动词不定式
1) 情态动词 ( 除ought 外) 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 (to be) nice. 他应该是个好人。
典型例题
1) —— I usually go there by train.
---- Why not ___ by boat for a change?
A. to try going B. trying to go C. to try and go D. try going
答案:D. why not 后面接不带to 的不定式,因此选D.
2) Paul doesn't have to be made ___. He always works hard.
A. learn B. to learn C. learned D. 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。
[动词不定式]不定式的特殊句型too…to…
1)too…to 太…以至于…。例如:
He is too excited to speak. 他太激动了,说不出话来。
---- Can I help you ? 需要我帮忙吗?
---- Well, I'm afraid the box is too heavy for you to carry it, but thank you all the same.
不用了。这箱子太重,恐怕你搬不动。谢谢。
2) 如在too前有否定词,则整个句子用否定词表达肯定,too 后那个词表达一种委婉含义,意 为"不太".例如:
It's never too late to mend. 改过不嫌晚。(谚语)
3) 当too 前面有only, all, but时,意思是:非常… 等于very.例如:
I'm only too pleased to be able to help you. 能帮助你我非常高兴。
He was but too eager to get home. 他非常想回家。
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 (to be) nice. 他应该是个好人。
典型例题
1) —— I usually go there by train.
---- Why not ___ by boat for a change?
A. to try going B. trying to go C. to try and go D. try going
答案:D. why not 后面接不带to 的不定式,因此选D.
2) Paul doesn't have to be made ___. He always works hard.
A. learn B. to learn C. learned D. 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。
[动词不定式]不定式的特殊句型too…to…
1)too…to 太…以至于…。例如:
He is too excited to speak. 他太激动了,说不出话来。
---- Can I help you ? 需要我帮忙吗?
---- Well, I'm afraid the box is too heavy for you to carry it, but thank you all the same.
不用了。这箱子太重,恐怕你搬不动。谢谢。
2) 如在too前有否定词,则整个句子用否定词表达肯定,too 后那个词表达一种委婉含义,意 为"不太".例如:
It's never too late to mend. 改过不嫌晚。(谚语)
3) 当too 前面有only, all, but时,意思是:非常… 等于very.例如:
I'm only too pleased to be able to help you. 能帮助你我非常高兴。
He was but too eager to get home. 他非常想回家。
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 (to be) nice. 他应该是个好人。
典型例题
1) —— I usually go there by train.
---- Why not ___ by boat for a change?
A. to try going B. trying to go C. to try and go D. try going
答案:D. why not 后面接不带to 的不定式,因此选D.
2) Paul doesn't have to be made ___. He always works hard.
A. learn B. to learn C. learned D. 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。