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1、动词不定式专项练习一、动词不定式作主语1. Its our duty _ the room every day.A. to clean B. cleaned C. clean D. cleans(甘肃省)2. Its hard for us _ English well.A. learn B. learns C. to learn D. learning(江西省)3 Its very nice _ you to get me two tickets _ the World Cup.A. for， of B. of， for C. to， for D. of， to(安徽省)Keys： 1. A
2、 2. C 3. . B简析动词不定式作主语时，可以直接放在谓语动词前面的主语位置，也可以用先行词it作形式主语，而将真正的主语(不定式)置于后面。常见的句式有：(1)It is +形容词(of sb)to do sth.(2)It is +名词(for sb)to do sth(3)It takes sb some time to do sth(4)It is +形容词(for sb)to do sth.句式(1)中常用nice， kind， clever， good， right， wrong， foolish， careless等形容词，与介词of搭配，这些形容词常表述不定式逻辑主语的属
3、性或性质；句式(4)中常用hard， difficult， easy， important等形容词，与介词for搭配，表示不定式表示的动作、行为的性质。注意： 当不定式作主语的句子中又有一个不定式作表语时，不能用It is to的句型(对)To see is to believe.百闻不如一见。(错)It is to believe to see.Its for s b.和 Its of s b.1) for s b. 常用于表示事物的特征特点，表示客观形式的形容词，如easy, hard, difficult, interesting, impossible等：Its very hard f
4、or him to study two languages. 对他来说学两门外语是很难的。2) of s b的句型一般用表示人物的性格，品德，表示主观感情或态度的形容词，如good, kind, nice, clever, foolish, right。Its very nice of you to help me. 你来帮助我，你真是太好了。for 与of 的辨别方法：用介词后面的代词作主语，用介词前边的形容词作表语，造个句子。如果道理上通顺用of，不通则用for。如：You are nice.(通顺，所以应用of)。He is hard.(人是困难的，不通，因此应用for。)A.It is
5、 right to stop killing wild animals.B.It is the best time to visit USA in summer.C.It is helpful for us to learn English well.二、动词不定式作宾语1. He wants _ some vegetables.A. buy B. buying C. to buy D. buys (山西省)2. Dont forget _ your homework with you when you come to school.A. to bring B. bringing C. to
6、take D. taking (福建省)3. He found it very difficult _.A. sleeping B. Sleeps C. slept D. to fall asleep (湖南省)Keys： 1. C 2. A 3. D简析在want， like， agree， hope， wish， learn， begin， start， seem， decide， hate， choose， forget， remember等动词后面，可以接不定式作宾语。如果其后接形容词补足语时，则可以用it作形式宾语，而把作真正宾语的不定式放到后面Sb + V + it （形式宾语）+
7、 agj （形容词）+to+ V（宾语）注意无BE动词。三、动词不定式作宾语补足语1. Robert often asks us _ his Chinese, so his Chinese is much better than before.A. help him B. to help him with C. to help with D. helps him with (江苏省)2. Mr Li often teaches his Japanese friends _ Chinese food.A. cook B. cooks C. to cook D. cooked (甘肃省)Key：
8、1. B 2. C简析不定式可以用作宾语补足语。后面可以接不定式作宾语补足语的动词有：ask， teach， expect， tell， allow等。四、动词不定式作状语1. She went _ her teacher.A. to see B. looks C. saw D. seeing (江西省)2. Meimei likes English very much. She does her best _ English well.A. learn B. learning C. to learn D. learns (四川省)Key： 1. A 2. C简析go， come， try，
9、do / try ones best等动词或短语动词作谓语时，其后常常可以接不定式作目的状语。3. Im sorry _ that.A. hears B. hearing C. hear D. to hear (河北省)4. Im sorry _ you.A. trouble B. to trouble C. troubling D. troubled (吉林省)5. My mother was very glad _ her old friend.A. to meet B. meet C. met D. meets (甘肃省)Keys： 3. D 4. B 5. A简析be +形容词+ to
10、 do sth结构中的不定式作状语，常表示原因或方式。6. The panda is so large that it cant go through the hole.(改为意思相同的句子)The hole _ _ _ _ such a large panda to go through. (广东省)7. The ice on the lake was so thin that people couldnt skate on it. (改为意思相同的句子)The ice on the lake wasnt _ enough _ people _ _ _. (广东省)Keys： 6. is，
11、too， small， for 7. thick， for， to， skate， on简析在上述too +形容词/副词(for sb)to do(太而不能)和enough (for sb) to do(足以、足够做)结构中，不定式作结果状语。 sosuch. that.如此.以致.的用法及与其它句型的互换.A.SbSth +be V+ so + adjadv (aan+adj +n)+that + cantcouldnt.= SbSth +be V+ too+adjadv(for+SbSth)+to+V . .如此.以致.=太而.不能.B、.so that to =in order to+V
12、动词that+从句 .为了以便于.C、.SbSth +be+ so + adj形容词a an +n V +adv副词(so +littlemanymuch. such +aan+adj +n 名形容词+名词)+that + canould=.SbSth +be V+adjadv +enough足够的 + to+V.如此.以致于.=.足够.干.如：他太年轻了而不能去上学。A. He is too young to go to school.B. He is so young that he cant go to schoolC He is nt old enough to go to schoo
13、l.D. He is so a young boy that he cant go to school（ ）1、The water is _ dirty _ the animals cant drink it.A. too . to B.so. that C. such ,that D. nt ,enough to 答案是A（ ）2、The computer cost _much money _ I cant afford to buy it.(答案选项同1)答案：B。因money前有 much所以不能用 such3环境的污染如此严重，一些濒危动物无法生存下去。Environment _ _
14、_ for endrangered animals to live on.五、动词不定式作定语1. Would you like something _?A. drink B. drinking C. to drink D. drinks (湖北省)2. I have a lot of homework _.A. do B. doing C. did D. to do (河南省)3. He is not an easy man _.A. get on B. to get on C. get on with D. to get on with (山东省)Key： 1. C 2. D 3. D简析不定式作定语时，常放在被修饰的词语之后，与被修饰的词语为逻辑上的主谓关系或动宾关系；如果不定式的动词是不及物动词，其后要加上必要 的介词或副词，构成的短语动词相当于及物动词。六、不带to的动词不定式1. We saw him _ the building and go upstairs.A. to enter B. enter C. entering D. entered (河南省)2. So much work usually makes them _
