初二英语动词不定式用法小结
动词不定式是动词的一种特殊形式，它没有人称和数的变化，在句子中不能做谓语；它由“to+动词原形”构成，其否定形式是“notto+动词原形”.在句子中可作主语、表语、宾语、宾语补足语、定语和状语等句子成分。

为使同学们更好地掌握其用法，现总结如下：
一、动词不定式作主语
动词不定式作主语，例如To think of the animals in danger is sad .为避免句子的头重脚轻，常用it作为形式主语，而真正的主语动词不定式后置，如It is sad to think of the animals in danger .常用句型:It +be+adj./n to do sth./It takes sb. some time to do sth.
二、动词不定式作宾语
一些动词，如want, decide, hope, ask, agree, choose, learn, plan, need, teach, prepare,等，常接动词不定式作宾语。

应注意有些动词后面可接不定式作宾语，也可接动名词作宾语，但所表达的意义不同。

常见的有：（1）stop to do sth.停下来去做另一件事；stop doing sth. .停止正在做的事（2）tryto do sth.尽力做某事；try doing sth.尝试做某事（3）remember/forget to do sth.记住／忘记去做某事；remember/forget doing sth.记得／忘记做过某事。

下列动词（enjoyfinish keep mind practice spendadvise suggest allow）后面不能用不定式，用动名词作宾语
三、动词不定式作宾语补足语
有些动词，如tell, ask, want, invite, teach, like, call等可接带to的动词不定式作宾语补足语，构成tell/ask/want /call/invite sb. to do sth.结构。

而表示使役动词和感官动词后面的宾语补足语时应省去to，（在被动语态中应加上to）。

这些动词可归纳为“一感(feel)，二听(listen to, hear)，三让(let, make,have,，四看(look at, see, watch, notice)，半帮助(help)(即在动词help后面作宾语补足语时，to可有可无)”。

四、动词不定式作状语
动词不定式作状语主要用来修饰动词，表示目的they did lots of workto save the candas等。

，表结果，常用结构有too + adj./adv. + to do sth. adj./adv.enough + to do sth，表原因be +形容词+ to dosth如I am surprised to hear the news.为了强调目的，有时可以把动词不定式放在句首，或在不定式前加in order或so as to。

五、动词不定式作后置定语时，与被修饰的名词逻辑上有动宾关系。

如果动词不定式是不及物动词时，则要带上与之搭配的介词，构成及物动词短语。

动词不定式作后置定语常用于“have/has＋某事＋to do”（some words to say, nothing to do,enough place to live）“It’s time to do sth.”等结构中。

六、特殊疑问词+不定式
特殊疑问词what when why how where等可以和不定式连用在句子做各种成分。

如How touse compurers is a problem. I can`t decide when to do it .
动词不定式专项训练题：
一、单项选择。

1. _______ is difficult to work out the maths problem.
A. This
B. That
C. It
D. Its
2. We decided _______ at the end of this month.
A. travel
精品文档B. not start outC. to leaveD. going
3. They have no paper_______.
A. to write
B. to write with
C. write onD .to write on
4. Let him _______ a rest. I think he must be tired after the long walk.
A. has
B. have
C. to have
D. having
5. _______the computer is a problem.
A. How to use
B. What to use
6. The teacher told us _______in bed.
A. don’t read
A. so, that
A. not go
B. as, as
C. too, to
D. very, to
B. read not
C. to not read
D. not to read
7. The old man was _______angry _______ say a word.C. Where to useD. Which to use
8. Why _______home tomorrow?
B. not going
C. not to go
D. didn’t go
9. The TV set is too loud. Will you please _______?
A. turn down it
B. turn it down
10. It’s cold outside. You had better _______ your coat.
A. to put on
B. putting on
C. puts on
D. put on
C. to turn it down
D. to turn down it
二、用所给动词的正确形式填空。

1. It took half an hour _______(get) to the World Park from Kitty’s school.
2. It was interesting _______(see) so many places of interest from all over the world.
3. They want _______(save) time by using shorter words and phrases.
4. Kitty’s classmate, Daniel, taught himself how _______(make) a home page.
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5. I`m glad ________(see) you in Beijing
6. He put his photos on it for everyone _______(look) at.
7. Help him _______(put) the photos in the correct order.
8. He made the girl _______(cry) yesterday.
9. It’s time for class. Please stop _______(talk).
10. I’d like _______(go) to the Temple of Heaven.
精品文档。