大学英语四级常用语法
被动式: 当不定式的逻辑上的主语是不定式所表示的动作的承受者时, 不定式一般要用被动形式.
It is an honour for me to be asked to speak here.
She hated to be flattered.
He wanted the letter to be typed at once.
This is bound to be found out.
There are a lot of things to be done.
She was too young to be assigned such work.
功用: 不定式可以作主语 (a), 宾语 (b), 表语 (c), 定语 (d) 或是状语 (e).
a. To scold her would not be just.
b. We are planning to build a reservoir here.
c. One of our main tasks now is to mechanize agriculture.
d. Do you have anything to declare?
e. We have come to learn from you.
不带to 的不定式:
在“动词+ 宾语+不定式”结构中, 如果动词是表示感觉意义的see, hear, watch, smell, feel, notice等, 或是表示“致使”意义的 have, make, let等, 其后的不定式结构不带to.
John made her tell him everything.
这类结构转换为被动语态时, 后面的不带to 的不定式一般还原为带to 的不定式.
She was made to tell him everything.
在 had better, had best, would rather, would sooner, would just as soon, might (just) as well, cannot but 等搭配之后, 动词不定式也不带to.
I'd rather not have eggs and bacon for breakfast.
They cannot but accept his term.
在make do, make believe, let drop, let fall, let fly, let slip, let drive, let go of, let there be, hear say, hear tell, leave go of等固定搭配中, 用不带to的动词不定式.
John let fly a torrent of abuse at me.
I've heard tell of him.
在动词help(或help +宾语)之后可用不带to的不定式, 也可用带to的不定式.
Can I help (to) lift this heavy box?
在介词except, but 之后, 如果其前有动词do的`某种形式, 不定式一般不带to, 反之带to.
There is nothing to do except wait till it stops raining.
Smith will do anything but work on a farm.
There's no choice but to wait till it stops raining.
连词 rather than, sooner than 置于句首时, 其后的不定式不带to.
Rather than push the book back as he wanted to do, he forced himself to pick it up.
出现在句中其他位置时, 其后的不定式有时带to, 有时不带to.
He decided to write rather than telephone.
The manager believes it is important to invest in new machinery rather than to increase wages.
用作补语的动词不定式, 如果主语是由“all + 关系分句”，“thing +关系分句”，“what分句”或“thing +不定式结构”等构成，并带有do的某种形式，这时，作为主语补语的不定式可以省to，也可以不省.
What he will do is (to) spoil the whole thing.
All you do now is complete the form
The only thing I can do now is go on by myself.
The thing to do now is clear up this mess.
The least I can do is drive everybody else closer to the issue.
1. The children went there to watch the iron tower _D_.
A to erect B be erected C erecting D being erected
watch 看电视用，看比赛用; see 看电影用;
感官动词watch， see， hear; 感官动词 + 名词(代词)+ do
be erected 强调的是动作的结果; being erected 强调的是动作的过程。
2. The engine _D_ smoke and steam.
A gives up B gives in C gives away D gives off
give up 放弃; give in 屈服，让步; give off 释放，放出(烟和气体);
give away 泄露，走漏风声;婚礼中新郎的父亲把新娘的手交给新郎的过程;赠送礼品。
3. The manager promised to keep me _C_ of how our business was going on.
A to be informed B on informing C informed D informing
keep sb. + 分词; inform v. 通知，告知; inform sb. of sth. 通知某人某件事情
keep me informed 使我被告知。
4. The goals _B_ he had fought all his life no longer seemed important to him.
A after which B for which C with which D at which
fight with sb. (注意要看整个句子); fight with + 工具 用该工具来打仗。 fight for 为…而战。
I fight with him. 我和他打起来了。 I fight with him against her. 我和他并肩对付她。
5. They _C_ in spite of the extremely difficult conditions.
A carried out B carried off C carried on D carried forward
in spite of 尽管; carry on 坚持，继续。
6. I should like to rent a house， modern， comfortable and _B_ in a quiet neighborhood.
A all in all B above all C after all D over all
all in all 总而言之;above all 首先，尤其是;after all 毕竟，终究;overall 全面的，总体的
in a word 总之，in short 简而言之，in conclusion 最后，总之，to sum up总之，总而言之。
7. _B_ we have finished the course， we shall start doing more revision work.
A For now B Now that C Ever since D By now
now that 既然，由于(相当于since); ever since 自从…以来。
与that搭配且后面可以加句子的几个表达形式：
now that 既然，由于; in that 因为; except that 除…之外。
except后面加名词或代词;except that后面加句子。
8. What you have done is _D_ the doctor’s orders.
A attached to B responsible to C resistant to D contrary to
be attached to 连接，附属; This school is attached to Beida. 这所学校附属于北大。
responsible to 对…负有责任; resistant adj. 反抗的，抵抗的; water resistant 防水的。
be contrary to 与。。相反(相违背)。
9. John regretted _A_ to the meeting last week.
A not going B not to go C not having been going D not to be going
regret doing 后悔做过某事; regret to do sth. 遗憾的做某事(应用语境非常有限)。
10. We regret to inform you that the materials you ordered are _B_.
A out of work B out of stock C out of reach D out of practice
out of work 失业; out of reach 够不着 within reach 够得着; out of practice 缺乏练习。
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