东台中学英语不定式的讲解_免费下载.doc

第一讲：不定式不定式和动词象一对姐妹一样亲密，本不该拆开来讲，可是篇幅有限，只能让他们分开了。 不定式的构成非常简单，告诉我是什么？对！是to+动词原形。当然啦，to有时也可以不带。动词不定式没有人称和数的变化，可以担当除谓语外的任何句子成分。那什么时候可以不带to呢? Listen to me carefully. 不定式省to有四种情况： 1. 使役动词 let, have, make 等后接不定式。如：Let him go! 让他走! 2.would rather，had better后。如：You had better stay at home.你最好呆在家里。 3. Why. / why not.后。如：Why not have a good rest on Sunday? 为什么星期天不好好休息一下呢? 4.感官动词 see, watch, look at, hear, listen to, smell, feel, find 等后作宾补，省to。如：I saw him dance. 我看见他跳舞。 注意：这些情况在被动句中可千万不可省to 哟！ 如：The boss made them work the whole night. 变成被动句：They were made to work the whole night. 不定式的特殊用法： It与不定式：动词不定式可以做主语，但如果动词不定式太长，显得头重脚轻的，那么我们就可用形式主语it代替，而把真正主语(即不定式)放于句尾。 如: It is not difficult for me to study English well.(对我来说学好英语是可能的。)不定式还可以充当句子的宾语，但有些动词，如find，think，believe 等，在语法上不能接受不定式作宾语，只有用it作形式宾语，从而把动词不定式置于句尾。这样的不定式可继续充当其宾语的作用。 如: I found it difficult to fall asleep.我发现很难入睡。 还有一点：动词不定式，还可用在how，when，where，what，which 等疑问代词或副词之后，与其共同作宾语。如：I dont know how to use a computer.我不知道怎样使用电脑。Remember? too.to.和enough.to：too.to表达太 . 一致于不能.。 enough . to 表达 足以.。这两个词组的用法用两个例子就可以说清楚了。 The box is too heavy for me to lift.这个箱子太沉了，我提不动。 He is old enough to go to school.他到上学的年龄了。也就是说，他的年龄足够 上学了。记住这两个句子就可以举一反三，应用自如。你记住了吗？ 好吧，再试一把趁热打铁！ 练习： 1. Tell him _ the window. A. to close not B. not to close C. to not close D. not close 2. Paul doesnt have to be made _. He always works hard. A. learn B. to learn C. learned D. learning 3. Youd better _the story in Japanese. A. say B. speak C. tell D. talk 4. The patient was warned _ oily food after the operation. A. to eat not B. eating not C. not to eat D. not eating 5. - I usually go there by train. - Why not _ by boat for a change? A. to try going B. trying to go C. to try and go D. try going 6. There are some books on the floor, would you like _? A. to pick them up B. to pick up them C. pick it up D. pick up it 7. She is very ill, lets _a doctor at once. A. to wake up B. send for C. to pay for D. pay for 8. I want _a teacher when I grow up. A. to be B. to C. be D. being 9. Its cold here. Youd better _ your coat. A. not take out B. not to take down C. not take off D. not to take away 10. My mother told me _more water. A. drinking B. drank C. to drink D. drink 实战： 1. Youd better _read in the sun. A. not to B. not C. dont D. to 2. You arent a new driver, are you? _. A. No, I am B. Yes, Im not C. No, you are D. Yes, I am 3. Must I stay here now?_. A. No, you mustnt B. No, you neednt C. Yes, you can D. Yes, you may 4. There is _s in the word bus. A. a B. an C. the D. / 5. Neither of us _a doctor. A. is B. isnt C. are D. arent 6. Who was the first in the girls_ race ? A. 400 metre B. 400-metre C. 400 metres D. 400-metres 7. Its too noisy here, I cant _. A. go to sleep B. fall to sleep C. sleeping D. get to sleep 8. The story happened _ the evening of October 20, 1995. A. at B. on C. in D. to 9. Could I speak to Mr Gao, please? _. He has gone to the hospital. A. I think so B. Certainly, you can C. Im afraid not D. Im not sure 10. Im sorry to trouble you, Miss Hu. _. A. Fine, thank you. B. All right. C. Its very kind of you . D. It doesnt matter. 11. Can you tell me where_? A. is the post office B. the post office is C. does the post office D. the post office does 12. In England, the first name is _name, but in China, the first name is _ name. A. family, given B. given, family C. family, family D. given, given 13. Li Ping met an old friend of _ on a train yesterday. A. he B. him C. his D. her 14. Kate is _ girl. A. a eighteen-year-old B. a eighteen-years-old C. an eighteen -years-old D. an eighteen-year-old 15. Our city is getting _. A. beautiful and beautiful B. beautifuler and beautifuler C. more and more beautiful D. more beautifler and more beautifuler 第二讲：动词语态 和时态一样，语态也是动词的一种形式，用来说明句中主语和谓语的关系。如果动作由主语执行，就可使用主动语态，如果主语不是由主语执行，主语是动作的承受者，则可使用被动语态。由此我们可以看出英语动词有两种语态：主动语态和被动语态。 被动语态：表示主语是动作的承受者，什么事情被主语做。被动语态的构成和形式被动语态由助动词be+及物动词的过去分词构成，一定要记住是及物动词。助动词必须与主语的人称和数一致，注意要与我们前一讲学过的八个时态配合使用。 适合被动语态的情况： 不知道动作由谁发出，或由于某种原因没有必要说明谁发出动作。如： This table is made of wood. 需要突出或强调动作的承受者时，如： This park was built for children. 注意：主动句中的主语如果是people，they，somebody等含糊的表示人或人们，没有确指执行者是谁，为被动句时，通常省略by+执行者。如： The door was opened secretly. But nobody came in. 注意：在主动句里,不定式在make，see，hear等动词后面作宾语补足语时都不带to，但变成被动句时，后面的不定式都需带to。如：He was made to do that work. 主动语态不能变被动语态的情况： 学了被动语态，别以为主动句和被动句可以随意转换，千万要注意呀！有些主动语态 不能转换成被动语态。 当宾语是反身代词时, 如： You should take care of yourself. 当谓语是表状态的而不是表具体动作的及物动词时，如： Does the skirt suit you? 练习： 1. The stars _ in the daytime. A. cant see B. cant be seen C. cant been see D. see 2. A present _ to me by Mother next week. A. will give B. is given C. will be give D. will be given 3. The Communist Party of China _ in Shanghai in 1921. A. was found B. found C. was founded D. founded 4. Great changes _ in my hometown since liberation. A. have been taken place B. took place C. have taken place D. were taken place 5. I was astonished (吃惊) to hear that the colour TV set _ 5,000 yuan. A. has cost B. cost C. costed D. was cost 6. He was seen _ something from the shop. A. steel B. to steal C. to be stolen D. stealed 7. She has _ by her classmates. A. laughed B. laughed at C. been laughed D. been laughed at 8. The computer _ in the room. A. can use B. can be use C. can be used D. can used 9. That clock _ Big Ben. A. call B. calling C. is called D. calls 10. The film _ again sometime next week. A. shows B. will shows C. will be shown D. shows 实践： 1. I have never seen _ UFO in _ sky. A. a , the B. an , the C. a, a D. the, a 2. -How is your brothers housework done? -_ A. Good B. All right C. Quite well D. Very bad 3. They come from England . They are _. A. Englishman B. English C . Englishmans D.an English 4. Would you please give me _ colour pencils? A. any B. some C. a little D. much 5. My father is sleeping now, could you _ the radio a bit? A. turn up B. turn on C. turn down D. turn off 6. It will be Childrens Day soon and were now _ busy _a bee. A. as.as B. as . like C. like.as D. so . like 7. -Well ,_? -I have a headache, doctor. A. how do you do B. whats the matter with you C. how are you feeling like D. what kind of illness do you have 8. The teacher told the boy _ it again. A. dont do B. does not do C. to not do D. not to do 9. I left here, _. A. Mary does B. so does Mary C. Mary did so D. so did Mary 10. -Who teaches _ English? -Mr Lin. A. you B. your C. she D. Toms 11. Have you finished _ the book? A. read B. to read C. reading D. reads 12. The farmers taught us _. A. to how pick apples. B. how pick apples. C. how picking apples D. how to pick apples 13. -_ I watch Pro. Brown from morning till night? -No, you neednt. A. Must B. Can C. May D. Need. 14. Do you know _? A. how long has he lived here B. how long he has lived here C. he has lived here how long D. he has lived how long here 15. We will go to the Great wall if it _ tomorrow. A. doesnt rain B. wont rain C. isnt raining D. didnt rain 第三讲：被动语态 被动语态复习 ABC A熟记结构 被动语态的结构为“助动词be及物动词的过去分词（pp）”。被动语态的不同时态是通过be的时态变化来表示的，其人称和数方面应与主语保持一致。其具体变化为： 一般现在时：amisarepp 一般过去时：waswerepp 一般将来时：shall will be pp 现在完成时：have has been pp 现在进行时：amisarebeingpp 过去将来时：should would be pp 含情态动词的被动结构：情态动词bepp例如： Chinese _ by the largest number of people Aspeak Bis speaking Cspeaks Dis spoken The boy _ to get supper ready after school Awere told Bis telling Cwas told Dtells （选C。一般过去时的被动语态） A lot of new roads _ built in the west of China Amust Bmust be Chas Dhave （选B。含情态动词的被动语态） B明确用法 被动语态常用于以下两种情况： 1不知道谁是动作的执行者，或者没有必要指出谁是动作的执行者； 2强调动作的承受者。例如： 这棵树是那个男孩弄断的。 The tree _ _ by that boy （填was broken） C熟练转换 1将主动语态变被动语态的基本方法为： 将主动语态的宾语作被动语态的主语； 谓语动词变为“be及物动词的过去分词”，并通过be的变化来表达出不同的时态； 主动语态的主语变为介词by的宾语，组成介词短语放在被动结构中的谓语动词之后。（有时by短语可以省略）。 2被动语态的一般疑问句是将一个助动词置于主语之前；否定句是在第一个助动词后加not；特殊疑问句的语序为：疑问词一般疑问句。例如： You must throw the broken pottery away at once The broken pottery _ _ _ _ at once（同义句） （填must be thrown away） Where did they grow vegetables？（改为被动语态） Where _vegetables _？（填were；grown） D注意特例 将主动语态变被动语态应注意几个特殊情况： 1含双宾语的主动结构变为被动结构时，有两种方法： 将间接宾语变为主语，直接宾语保持不变； 将直接宾语变为主语，间接宾语用介词to或for引导。例如： He told us a story（变被动语态） We were told a story（by him）或：A story was told to us by him Her mother gave her a new pen（变被动语态） A new pen _ _ _ her by her mother 2短语动词的被动语态：在变为被动语态时，要将短语动词视为一个整体，其后的介词或副词不能省去。例如： This dictionary mustnt _ from the library Atake away Btaken away Care taken away Dbe taken away She will take good care of the children（变被动语态） The children will _ _ _ _ _ （by her）3含有复合宾语的主动结构变被动结构时，通常将宾语变为被动句的主语，而宾语补足语就成为主语补足语。注意：省略to的不定式作宾补时，不定式符号to必须补上。例如： Someone saw him swim in Qianling Lake yesterday（变被动语态） He _ _ _ swim in Qianling Lake yesterday （填was seen to） 4不定式的被动结构：动词不定式的被动语态为“to be 过去分词”。例如： The radio says a wild animal zoo is to _ in our city Abe building Bbuild Cbe built Dbuilt 5以疑问代词开头的疑问句转换成被动句时要注意词序：应将主动句中的疑问代词改为介词by的宾语，但仍然放在句子开头。例如： Who has broken the cup？（改为被动语态） By whom has the cup been broken？ E注意区别