2020年12月大学英语四级语法知识
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2020年12月大学英语四级语法知识【篇一】2020年12月大学英语四级语法知识
不定式的特殊句型too…to…
1)too…to太…以至于…
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。谢谢您。
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"。
It's never too late to mend. (谚语)
改过不嫌晚。
3) 当too 前面有only, all, but时,意思是:非常… 等于very。
I'm only too pleased to be able to help you. 我非常高兴能协助你。
He was but too eager to get home. 他非常想回家。
【篇二】2020年12月大学英语四级语法知识
用作介词的to
to 有两种用法:一为不定式+动词原形; 一为介词+名词/动名词, to 在下面的用法中是第二种,即to+ 名词/动名词:
admit to承认,
confess to承认,
be accustomed to 习惯于,
be used to 习惯于, stick to 坚持,
turn to开始,着手于,
devote oneself to 献身于,
be devoted to 致力于,
look forward to 盼望,
pay attention to 注意
【篇三】2020年12月大学英语四级语法知识
省to 的动词不定式
1) 情态动词 ( 除ought 外,ought to):
2) 使役动词 let, have, make:
3) 感官动词 see, watch, look at, notice , observe, hear, listen to, smell, feel, find 等后作宾补,省略to。
注意:在被动语态中则to 不能省掉。
I saw him dance.
=He was seen to dance.
The boss made them work the whole night.
=They were made to work the whole night.
4) would rather,had better:
5) Why… / why not…:
6) help 可带to,也可不带to, help sb (to) do sth:
7) but和except:but前是动词do时,后面出现的动词用不带to的动词不定式。
8) 由and, or和than连接的两个不定式,第二个to 能够省去:
9) 通常在discover, imagine, suppose, think, understand等词后,能够省去to be:
He is supposed (to be) nice. 他应该是个好人。
举例:
He wants to move to France and marry the girl.
He wants to do nothing but go out.
比较: He wants to do nothing but go out.
He wants to believe anything but to take the medicine.