一。to做介词+doing
mit to doing sth。认可
nfess to doing sth。认可，
accustomed to doing 习惯于，
used to doing 习惯于，
ick to doing sth。
对峙，
6。turn to doing sth。起头，动手于，
vote oneself to doing sth。献身于，
devoted to doing sth 努力于，
9。look forward to doing sth。
盼愿，
y attention to doing sth 留意
二。to do
afford aim appear agree arrange ask be decide bother care choose come dare demand desire determine expect elect endeavor hope fail happen help hesitate learn long mean manage offer ought plan prepare pretend promise refuse seem tend wait wish undertake7。
1 不定式做宾语
1) 动词+ 不定式
afford aim appear agree arrange ask be decide bother care choose come dare demand desire determine expect elect endeavor hope fail happen help hesitate learn long mean manage offer ought plan prepare pretend promise refuse seem tend wait wish undertake
举例：
The driver failed to see the other car in time。
司机没能及时看见另一辆车。
I happen to know the answer to your question。
我碰巧晓得你那道问题的谜底。
2）动词+不定式 ； 动词+宾语+不定式
ask, beg, choose, expect , hate, help intend like, love, need prefer, prepare, promise, want, wish…
I like to keep everything tidy。
我喜好每件工具都连结整洁。
I like you to keep everything tidy。 我喜好你年使每件工具都连结整洁。
I want to speak to Tom。 我想和汤姆谈话。
I want you to speak to Tom。
我想让你和汤姆谈话。
3） 动词+疑问词+ to
decide, know, consider forget, learn, remember, show, understand, see, wonder, hear, find out, explain, tell
Please show us how to do that。
请演示给我们若何去做。
There are so many kinds of tape-recorders on sale that I can't make up my mind which to buy。有那么多的灌音机，我都拿不定主意买哪一种。
留意:疑问词带不定式在句中做成分时，谓语动词用单数。
The question is how to put it into practice。
问题是如何把它付诸施行。
7。2 不定式做补语
1) 动词+宾语+不定式(to do)
advise allow appoint believe cause challenge command compel consider declare drive enable encourage find forbid force guess hire imagine impel induce inform instruct invite judge know like order permit persuade remind report request require select send state suppose tell think train trust understand urge warn
例句：
a。
Father will not allow us to play on the street。
父亲不让我们在街上玩耍。
b。 We believe him to be guilty。
我们相信他是有功的。
Find 的特殊用法：
Find 后可用分词做宾补，或先加形式宾语，再加描述词，最初加带to 的动词不定式。find后也可带一个从句。此类动词还有get，have。
I found him lying on the ground。
I found it important to learn。
I found
d that to learn English is important。
典型例题:
The next morning she found the man ___ in bed，dead。
ying谜底： nd的宾语后面，用分词或分词短语，起宾语补足语感化。如今分词表达主动，也表达正在停止，过去分词表达被动。
2) to + be 的不定式构造，做补语的动词。
Acknowledge, believe, consider, think, declare(声称), discover, fancy(设想), feel find, guess, judge, imagine, know, prove, see(理解), show, suppose, take(认为), understand
We consider Tom to be one of the best students in our class。
我们认为汤姆是班上更好的学生之一。
典型例题
Charles Babbage is generally considered ___ the first computer。
haveinventedD。havinginvented谜底：A。
由consider to do sth。 排除B、D。。 此句只申明创造那一个事实，不定式后用原形即可。而C为如今完成时，创造为点动词一般不消完成时，且此处也不强调对如今的影响，因而不选C。
3) to be +描述词
Seem, appear, be said, be supposed, be believed, be thought, be known, be reported, hope, wish, desire, want, plan, expect, mean…
The book is believed to be uninteresting。
人们认为那本书没什么意思。
4) there be+不定式
believe, expect, intend, like, love, mean, prefer, want, wish, undrstand
We didn't expect there to be so many people there。
我们没料到会有那么多人在哪里。
留意 ： 有些动词需用as 短语做补语，如regard, think believe, take, consider。
We regard Tom as our best teacher。 我们认为汤姆是我们更好的教师。
Mary took him as her father 。 玛丽把他当做本身的父亲。
7。3 不定式主语
1） It's easy (for me) to do that。我做那事太容易了
easy, difficult, hard, important, possible, impossible, comfortable, necessary, better;
the first, the next, the last, the best, too much, too little, not enough
It's so nice to hear your voice。
听到你的声音实快乐。
It's necessary for you to lock the car when you do not use it。
当你不消车的时候，锁车是有需要的。
2) It's very kind of you to help us。
他帮忙我们，他实好。
Kind, nice, stupid, rude, clever, foolish, thoughtful, thoughtless, brave, considerate(考虑殷勤的), silly, selfish(无私的)
例句:
It was silly of us to believe him。
我们实愚笨，竟然相信了他。
以上都是动词不定式的用法
like to do sth
like doing sth
would like to do sth
feel like doing sth
thanks for sth
thanks for doing sth
be surprised at sth
be surprised to do sth
ask sb sth
try to do sth
be always doing sth
be good for
want sb to do sth
look at...doing...
thanks ...for..doing sth
asksb。todosth。 sth.letsbdosth.