2022年初中阶段不定式总结及习题及答案.docx
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1、精选学习资料 - - - - - - - - - 学习必备 欢迎下载unit 1-3 语法 -不定式 to do 1不定式的基本形式与结构 动词不定式指通常由 to 加上动词原形如 to write 所构成的一种动词形式,但在有些情形下 to 可以省略;全部的主动词,不论是及物动词仍是不及物动词,都有不定式形式;没有不定式形式;动词不定式在语法功能上可作主语、宾语、表语、定语和状语;2不定式的用法 1不定式结构作主语 1.Te get contact with his family in Taiwan made him extremely happy since they separated
2、more than 40 years ago 2.To finish that task in such a short time is really a challenge在上述情形下,假如不定式较长,显得头重脚轻,就可由代词让作形式主语 形 式主语 it 不行由 that 或 this 等其他代词代替 ,而将不定式放到后面;如:1.It made him extremely happy to get contact with his family in Taiwan since they separated more than 40 years ago2.John admitted tha
3、t it is always difficult for him to be on time不定式结构所表示的动作是谁做的,即不定式的规律主语,通常可以通过for sb. to do sth. 结构表达:如: 1.It is quite important for us to read good books during a general review2. It is not difficult fot those talented students to pass the exam. 在某些形容词 如 careless,clever,considerate,foolish,good,imp
4、olite ,kind,naughty,nice,silly ,stupid 等作表语时,不定式后可以加 语:1.It is very kind of you to tell me the truth2.It is stupid of him to do such a silly thingof 来引导出其规律主2不定式作宾语to 的不定式,另一种是 “及不定式作宾语有两种:一种是及物动词后直接跟带物动词 +疑问词 +带 to 的不定式;及物动词 +带 to 的不定式结构 : 只能跟动词不定式的动词, 常见的有 : afford,agree,aim,appear,ask,believe,car
5、e,claim,decide demand,desire, determine,expect,fail ,happen,hesitate,hope, intend, learn, long, manage, offer, pretend, promise, prepare,refuse, seek, swear, undertake,want, wish 等;1.He managed to solve the complicated problem. 2.The stranger offered to show me the way. 3.Mr. Smith undertook to buil
6、d a new plant in South Africa. 动词 +疑问代 副词+不定式:这类动词常见的有 advise, decide, find out, forget, inquire, know, learn,see, regard中学英语语法总结,remember, teach, tell, understand, wonder 等;常见的疑问代 副词有: what, when, where, which, how, whether 等;1.He does not know when to start. 2.You can decide whether to continue or
7、 to stop. 3.I will show you how to deal with it. 名师归纳总结 - - - - - - -第 1 页,共 10 页精选学习资料 - - - - - - - - - 学习必备 欢迎下载有时,不定式可由 it 代替,而把不定式放到后面去;这可以用这一结构表达:动 词如 find, think,consider,feel 等+it+ 形容词 +不定式;1.She considers it necessary to make friends with him. 2.We find it difficult to finish all the homewo
8、rk before 9 oclock.3不定式做表语 一种情形为主语是不定式1.To see is to believe. 表示条件 ;表语是不定式 表示结果 :2.To work means to earn a living另一种情形为主语是以 aim,duty,hope, idea,job, plan,problem, purpose,thing,wish 等名词为中心的短语,或以 主语起补充说明作用: ;例如:what 引导的名词性从句,不定式表语对1.His aim is to study abroad in the near future2.The most important th
9、ing is to negotiate with them about the price3.What I want to say is to forget all the unhappy experience4不定式作定语 不定式结构作名词词组修饰语主要有三种类型:第一种,被修饰的名词词组是不定式的规律宾语;例如:1.There was really nothing to fear2.He gave me an interesting book to read假如不定式是不及物动词,后面就得加相应的介词;例如:1.Mary needs a friend to play with2.That
10、girl has nothing to worry about3.They have a strict teacher to listen to4.Although the film had been on for ten minutes, I still was not able to find a chair to sit on其次种,被修饰的名词词组是不定式的规律主语;例如:1.Have you got a key to unlock the door. 2.The action to be taken is correct3.There is nothing to be gained
11、by pretending第三种,被修饰的名词词组是不定式的同位结构;这类名词通常是表示妄想、 努力、倾向、目的、愿望、is 算、才能、意向等意义的名词: ability , attempt, effort,impulse, inclination ,wish 等;例如:1.Her daughter will make an even bigger effort to please her2.I have no wishto quarrel withyou3.Neither of them had any inclination to do business with Mary. 5不定式作状
12、语 不定式结构在句中作状语通常都能转换为限制性状语从句;例如作缘由状语:1.They are quite surprised to see the great changes taking place in the area 2.They are quite surprised because they see the great changes taking place in the area 3.He was lucky to arrive before dark4.He was lucky because he arrived before dark作目的状语:1.She raised
13、her voice to be heared better 2.She raised her voice so that she could heard better名师归纳总结 - - - - - - -第 2 页,共 10 页精选学习资料 - - - - - - - - - 学习必备 欢迎下载3.We went via Heidelberg to miss the traffic jam4.We went via Heidelberg so that we could miss the traffic jam作结果状语 :1.The French football team played
14、so successfully as to defeat the Brazilians 2.The French football team played so successfully that they even defeated the Brazilians3.He got to the station only to be told the train had gone4.He got to the station and was told that the train had gone 不带 to 的不定式的使用动词不定式通常带 to,但在有些搭配中不带 to,在另一些搭配中可带 t
15、o 可不带 to;归纳起来,以下情形下使用不带 to 不定式:1 在 cancould, /maymight,will would,shallshould,must, need,dare 等情态动词之后,动词不定式不带 to;2在表示感觉意义的动词, 如 see中学英语语法总结, feel,watch,notice,smell,hear,observe等后,或是表示 “致使 ”意义的动词,如 词不定式不带 to;例如:have,let,make 等后,动1.I often heard him say that he would study hardto 不定式一般转换为带to 不2.I mus
16、t have him see his own mistakes但是,当这类结构转换为被动语态时,后面的不带定式;例如:1.He was often heard to say that he would study hard2.After he had finished speaking,he was made to answer innumerable questions3在动词 help 之后可用不带 to 的不定式,也可用带 1.Help the old lady to carry the heavy box. to 的不定式;例如:4 在 had better,would rather,
17、maymight as well,rather than,can not but等搭 配之后中学英语语法总结,动词不定式也不带 to;例如:1.Unless you feel to ill to go out, I would rather not stay at home tonight2.She could not but criticize his foolish behaviour. 5 在 make do,make believe,let drop,1et fall,1et fly,let slip,let drive,let go off,hear say,hear tell,le
18、ave go of等固定搭配中,用不带 如:to 的动词不定式;例1.They let go of the rope他们松开了绳子;2.John let fly a torrent of abuse at me约翰朝我痛骂了一顿;3.Ive heard tell of him我听说过他;4.Some of the faculty were let go for lack of the students由于生源不足,一些教职 员工被解雇了;6在介词 but 中学英语语法总结中学英语语法总结,except之后,假如其前有动 词 do 的某种形式,其后不定式一般不带 to,反之就必需带 to,表示“
19、不得不,只能”;例如:1.He will do anything except work on the farm2.There was nothing left for the enemy to do but surrender3.The spy was both hungry and cold;there was nothing left for him but to give in4.I had no choice but to wait till it stopped raining名师归纳总结 - - - - - - -第 3 页,共 10 页精选学习资料 - - - - - - -
20、- - 下面一些短语是固定搭配,不带学习必备欢迎下载to:can not help but,can not choose but,can not but,do nothing but,have nothing to do but;例如:I can not but admire his courage. 假如上述句中有 do,to 省略:I did nothing but watch TV last night假如是下面一个固定搭配,就带 to:I have no choice but to give up my idea. 7紧跟在 why 或 why not 之后的动词不定式总是不带to;但
21、是,紧跟在 who,what,which,whether 等连接词后的不定式带 to;例如:Why stand up if you can sit down. Why not ask your teacher when you dont understand the meaning. You neednt decide yet whether to study arts or science4不定式的否定形式 否定形式是在不定式的标志to 前加 not;例如:1.I decided not to ask him again2.Please remember not to leave the l
22、ights on when you are out动词不定式练习一. 依据上句意思完成下句,使两句意思相近或相同,每空一词;1. He was so angry that he couldnt say anything.He was too angry _ _ anything. 2. I dont know when we will have the meeting.I don t know when _ _ the meeting. 3. He said he would write a letter. He said he would have a letter _ _. 4. That
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