初中英语动词不定式用法小结
动词不定式是动词的一种非谓语形式，又叫非谓语动词，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，这里的to是动词不定式符号，本身没有词义，其否定形式常在to前加not；由于它仍保持动词的特点，可以有自己的宾语和状语，还可以带疑问词和由for引出其逻辑主语等形成动词不定式短语；不定式或不定式短语具有名词、形容词和副词的特征，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
动词不定式作主语时，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。如要说明动作的执行者，可在不定式前加for引导的短语；但如果表语是nice, kind, clever等描述动作执行者的性格、品质的形容词时，则应在不定式前加of引导的短语。常用句型:It +be+adj./n.+(for/of sb.) 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。当动词不定式作宾语时，如果后接宾语补足语，常用it作形式宾语，而把真正的宾语放在宾语补足语之后。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.停止正在做的事，去做另一件事；stop doing sth..停止正在做的事（2）go on to do sth.做完一件事后，继续做另一件事；go on doing sth.继续做同一件事（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
三、动词不定式作定语
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”或“enough＋名词＋to do”“It’s time to do sth.”等结构中。
四、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。应注意动词不定式作使役动词和感官动词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)”。另有口诀帮助记忆：“感使动词真奇怪，to在句中像妖怪，主动句中to离开，被动句中to回来。”(let不用于被动语态)
五、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，结果或原因。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。常用结构有too + adj./adv.+ to dosth.等。
六、固定句式中动词不定式的用法
在固定句式中对不定式的考察常见的有：had better (not) do sth./Would you like to do sth.?/Why not do sth.?/Would you please (not) do sth.?等。 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 B.not start out C.to leave D.going 3.They have no paper_______.A.to write B.to write with C.write on D .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 C.Where to use D.Which to use 6.The teacher told us _______in bed.A.don’t read B.read not C.to not read D.not to read 7.The old man was _______angry _______ say a word.A.so, that B.as, as C.too, to D.very, to 8.Why _______home tomorrow? A.not go 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 C.to turn it down D.to turn down it 10.It’s cold outside.You had better _______ your coat.A.to put on B.putting on C.puts on D.put on
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 clamate Daniel taught himself how _______(make) a home page.5.Things _______(do) 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 cla.Please stop _______(talk).10.I’d like _______(go) to the Temple of Heaven.参考答案：
一、1—5 CCDBA
6—10 DCABD
二、1.to get 2.to see 3.to save 4.to make 5.to do 6.to look 7.(to)put 8.cry 9.talking 10.to go
