9Aunit3语法(一)动词不定式用法
动词不定式没有人称和数的变化,在句中不能独立作谓语。但动词不定式具有名词、形容词和副词特征,在句中可以作主语、宾语、宾语补足语、定语、表语和状语等多种成分。另外,动词不定式具有动词特点,可以有自己的宾语和状语,组成动词不定式短语。动词不定式的肯定形式是to+do;其否定形式是not to+do。
下面以动词不定式在句中的作用来予以详细说明。
1.作主语
可以直接作主语。如: To see is to believe.
但在英语中,常用it作形式主语,真正的主语即动词不定式放在后面。如:
It's wrong to play tricks on other people.
It's our duty to keep our environment clean and tidy.
点击规律:动词不定式在句中作主语时,常放在It is +adj.(形容词)+to do sth.或 It is +n.(名词)+to do sth.句型中,it仅作形式主语。
2.作宾语
a.want,decide ,agree等动词后面跟并且只能跟不定式。如:
We agreed to start early.
She wants to be a doctor.
b.love,like ,begin,start,hate ,prefer等词后面可以接不定式。
点击规律:上述动词后面除接不定式外,还可以接动名词,意思无很大区别。
提示板:like doing指经常性动作,而like to do指一次性的动作。如:
I like swimming,but I don't like to swim now.我喜欢游泳,但我现在不想游。
c.stop,forget,remember,go on ,try等词或短语后面可以接不定式。
点击规律:上述动词后面接不定式和接动名词意思大不相同。
提示板:
1)stop to do sth.:停止一件事,去做另一件事。
stop doing sth.:停止正在做的事。
例句:When the teacher came in,the students stopped talking;when he came out,the students stopped to talk. 当老师走进来时,学生们停止说话;当老师走出去时,学生们又开始说话。
2)思考:forget,remember,go on,try等词或短语后面接不定式和动名词用法有何区别?
d.在find/feel+it+adj.+to do sth.句型中,it是形式宾语,真正的宾语是后面的动词不定式。如:
The man downstairs found it difficult to get to sleep.
I feel it easy to recite the text.
点击规律:某些动词或短语后面既可以接动词不定式作宾语,又可接动名词作宾语,二者用法上的区别可以通过造句子加以区分,如上面stop例句。
3.作宾语补足语
a.tell,ask,want,order,teach,invite,warn,wish,help,get,wish,help等词后面常接不定式作宾补。如:
I tell him not to go there by bus .
Edison's mother taught him to read and write.
b.let,make,have,see,hear,feel,watch, notice后面接不带to的不定式作宾补。如:
The boss makes them work 16 hours a day. I heard her sing in the next room.
提示板:若变成被动语态,在上述结构中,不定式符号to要加上。如:
They are made to work 16 hours a day by the boss.
She was heard to sing in the next room.
4.作定语:放在被修饰的名词、代词后面
例句:I have a lot of work to do.
The doctor said he could do nothing to help the boy.
点击规律:动词不定式若在句中作定语,常放在被修饰的名词、代词之后。
提示板:如果动词不定式和前面所修饰的词构成动宾关系,若动词是不及物动词,切记不要忘掉介词。如:
I have a small bedroom to live in.
Have you got some pens to write with?
5.表语:放在连系动词be后面
例句:His wish is to become a scientist.
The first important thing is to save the soldiers' lives.
当务之急是抢救战士们的生命。
点击规律:动词不定式在句中作表语时,通常对连系动词前面的名词进行诠释说明。
6.作状语
a.目的状语:放在go,come,use,live,in order等词后面。如:
I come to see you.
He runs fast in order to get there in time.
b.原因状语:放在sorry,glad,surprised, disappointed,excited等词后面。如:
I am glad to see you here.
I am sorry to trouble you.
c.作结果状语。如:
Some of the apples are hard to reach.
The room is large enough to hold 1000 people.
7.与what,who,whose,when,where, how等疑问词连用,作宾语、宾语补足语、主语等。如: I don't know what to do next.(宾语)
He taught us how to use the computer.(宾语补足语)
It's still a question how to get there.(主语)
1. Don't forget _________ the letter.
A. to send B. send C. sending D. being sent
2. The chair looks very old, but in fact it is very comfortable to _________.
A. sit B. sit on C. be sat D. be sat on
3. Is ______ necessary to return the book tomorrow?
A. this B. that C. it D. which
4. I'm afraid they would not allow him ________ here.
A. to smoke B. smoking C. smokes D. smoke
5. Mother told me ________ the water before I drank it.
A. boiling B. boiled C. boil D. to boil
6. On my way home, I stopped _______ some food.
A. buy B. to buy C. buying D. bought
7. John was made _______ the car for a week as a punishment.
A. to wash B. washing C. wash D. to be washing
8. The sitting-room needs _______, but it'll have to wait until Saturday.
A. be cleaning B. to be cleaned C. clean D. being cleaned
9. The first thing I want to do is __________.
A. visit to him B. to visit him C. visiting him D. visited him
10. Li Yang advised me _________ too much, otherwise I would have been drunk.
A. not to drink B. to drink C. not drinking D. drinking
一. 用动词不定式或ing分词填空
1. I enjoy_________.(sing) 2. What do you want________(do) next ?
3. I learnt ______(swim) when I was three years old. 4. I was very upset and started_____ (cry).
5. I hope _______(see) you again soon. 6. It is a fine day today, so I suggest_____(go) for a walk.
7. Have you finished _________ (mop) the floor.8. He was very angry and refuse __(say)anything.
9. Where is Lily ? I need ________(talk) with her.
10. I am too fat, so I have decided _________(do) more exercise.
二. 选出正确答案
( )1. I usually go ________ with my mother at weekends.
A. shop B. to shop C. shopping
( )2. He is not old enough ________ to school.
A. to go B. go C. going
( )3. The man admitted _________the bank.
A. rob B. to rob C. robbing
( )4. People must stop ________down trees.
A. to cut B. cutting C. cut
( )5. I’d rather_______ a cup of coffee.
A. to have B. having D. have
( )6. Mike managed to give up _________.
A. to smoke B. smoking C. smoke
( )7. I am sorry to have kept you ________ for such a long time.
A. to wait B. waiting C. wait
( )8. She has a nice voice. I often hear her________ in the morning.
A. singing B. to sing C. sing
( )9. I don’t like traveling by boat, it always makes me ______sick.
A. to feel B. feeling C. feel
( )10. Let me_______ you around the city.
A. show B. to show C. showing
( )11. I put the flowers on the porch_______ from the rain.
A. protecting B. to protect C. protected D. to be protected
( )12. Kathy decided ______ hard and make herself______ behind the others.
A. to work; not fall B. working; not to fall
C. to work; fall D. working; to fall
( )13. She forgot_______ the TV when she left home.
A. to turn off B. turned off C. turning off D. turn off
( )14. My parents want me ________ good marks.
A. get B. to get C. getting D. got
( )15. The doctor asked Mary ________the medicine three times a day.
A. not to remember taking B. not to forget taking
C. not to remember to take D. not to forget to take
( )16. His job is________ the students’ meetings.
A. organize B. to organize C. organizing D. organized
( )17. What about_______ a letter to your friend on the Internet ?
A. try sending B. try to send C. trying sending D. trying to send
( )18.Let him________ it by himself.
A. to do B. doing C. did D. do
( )19. The customers watched the unusual bird_______ in the inn.
A. dance B. to dance C. danced D. dancing
( )20. At the police station, the boy admitted _______ the necklace at last.
A. to steal B. stealing C. stole D. steal
( )21. It is impossible ________.
A. for me to go to bed early B. to me to go to bed early
C. for me go to bed early D. to me go to bed early
( )22. I remember________ my wallet here. But I can’t_______ now.
A. putting; find B. to put; finding
C. to put; be found D. putting; be found
( )23. Could you tell me _______ work out the problem ?
A. how B. how can I C. how to D. how will I
( )24. I saw a little boy________ a kite yesterday afternoon.
A. flew B. fly C. to fly D. flying
( )25. His jokes made us all _________.
A. to laugh B. laughing C. laugh D. laughing
( )26. It’s very kind of you_______ me with my English.
A. help B. helping C. to help D. helps
( )27. He promised__________ me a nice car.
A. buy B. to buy C. bought D. to have bought
( )28. Mother told me ________ walk along the river.
A. do not B. not to C. to not D. not
( )29. Her ambition is ________ an engineer.
A. become B. to become C. be D. /
( )30. You’d better ________a rest now.
A. to have B. have C. having D. had
( )31. Thank you for ________me the secret.
A. telling B. tell C. to tell D. told
( )32. I used to______ in the countryside, now I am used to_____ in the city
A. living; live B. living; living C. live; living D. live; live
( )33. The detective is busy_______ clues and he has _______ some valuable proof.
A. looking for; find B. finding; looked for
C. looking for; found D. find; looked for
( )34. This film is worth ________.
A. to see B. seeing C. seen D. saw
( )35. I was allowed to play football after_________ my homework.
A. do B. did C. doing D. done
( )36. China is becoming __________.
A. strong and strong B stronger and strong
C. stronger and stronger D. strong and stronger
( )37. The population of China is larger than ________ of America.
A. those B. that C. it D. this
( )38. Our city is getting _________ .
A. more beautiful and more beautiful
B. more and more beautiful
C. beautifuler and beautifuler
D. beautiful and beautiful
( )39. Taxis in Shenyang are cheaper than ________ in Beijing.
A. that B. it C. this D. those
( )40. I prefer_______ basketball to _______ football.
A. playing; playing B. playing; play
C. play; playing D. play; play
(二)句子的种类
可分为陈述句、疑问句、祈使句和感叹句。
1. 凡是说明一件事情,提出一个看法,或者表达一种心情的句子都是陈述句。大多数的句子都是陈述句,它可以用肯定式和否定式,句末用句号“.”,通常用降调。
掌握陈述句的肯定式和否定式的构成及用法。
e.g. We live in Tianjin. (肯定句)我们住在天津。
We don't live in Shanghai. (否定句)我们不住在上海。
注意:(1)在一般现在时的肯定式中,主语是第三人称单数时,动词要改成第三人称单数形式。
e.g. John studies Chinese very well.
(2)一般现在时和一般过去时的否定式要加助动词do (does), did.
e.g. I don't like swimming. 我不喜欢游泳。
He doesn't have lunch at home every day. 他每天不在家吃午饭。
They didn't play football yesterday. 他们昨天没有踢足球。
2. 掌握一般疑问句、特殊疑问句、选择疑问句和反意疑问句的构成、用法和答语。注意在一般现在时和一般过去时的疑问句要加助动词do(does), did.
e.g. Do you often speak English at school ? 在学校你常讲英语吗?
Does she have a brother ? = Has she got a brother ? 她有兄弟吗?
Did it take you two hours to do your homework last night ?
昨天晚上做作业花了你2个小时吗?
What do you often do on Sundays ?
星期日你常常干什么?
When does your father get up every morning ?
你父亲每天早晨几点钟起床?
Why didn't your teacher come to school yesterday ?
昨天你们的老师为什么没来学校呢?
提出两种或两种以上的情况,要求对方选择一种,这种疑问句叫选择疑问句。结构是:“一般疑问句+or+一般疑问句”,但常把后一部分里面和前一部分相同的成分省略。说明or前面部分用升调,后面部分用降调。
e.g. Is her brother an artist or a doctor ?
她的兄弟是一个艺术家还是个医生?
Would you like tea or coffee ?
你愿意喝茶还是喝咖啡?
Shall we go to the cinema on Saturday or on Sunday ?
我们是周六还是周日去电影院?
反意疑问句表示提问者有一定的主见,但没把握,希望对方来证实。
注意反意疑问句的结构是:肯定的陈述句+否定的疑问句(缩略形式)
或:否定的陈述句+肯定的疑问句(缩略形式)
两部分的人称和时态要一致。
特别要注意否定的疑问句中的助动词必须缩写,主语(最后一个词)必须是代词而不能是名词。
e.g. Your sister has ever been to Shanghai , hasn't she ?
你姐姐曾经去过上海是吗?
The boys didn't find anything , did they ?
男孩子们什么也没找到/发现,是不是?
在回答反意疑问句时,要根据事实而定,事实是肯定的要回答Yes , …,事实是否定的要回答No, ….
e.g. He isn't going to the meeting , is he ?
他不去参加会,是吗?
Yes , he is . 不,他要去。
No , he isn't. 是的/对,他不去。
It didn't snow last week , did it ?
上周没有下雪,对吗?
Yes , it did. / No , it didn't. 不,下雪了。是的,没下雪。
3. 掌握祈使句的肯定式和否定式。祈使句没有主语。指让对方做某事,动词要用原形。表示请求,命令、建议等。
e.g. Go back to your seat , please. 请回到你的座位上去。
Don't make so much noise. 不要吵吵闹闹。
Let's go to school together ! 咱们一起上学去吧!
(let's是含有第一人称主语的祈使句)
Let him help the child. 让他帮助那个孩子。(let him是含有第三人称主语的祈使句)
注意:否定形式是Let's (us , me)+not +动词原形
e.g. Let's not say anything about it.
对于这件事,咱们什么也不要说了。
4. 表示喜怒哀乐等强烈感情时用感叹句,理解由What和How引导的感叹句的语序和感叹句的使用方法。How和What与所修饰的词放在句首,其它部分用陈述句语序。在口语中谓语常省略。
(1)how作状语,修饰形容词,副词或动词
结构:How+形容词/副词+主语+谓语
How nice the flowers are ! 花多漂亮啊!
How hard he works ! 他工作的多努力啊!
(2)what作宾语,修饰名词(名词前可有其他定语),单词可数名词前要加不定冠词a(an).
结构:What a (an)+形容词+名词+主语+谓语
e.g. What a clever girl (she is )!
她是一个多么聪明的女孩啊!
What delicious food ! 多么好吃的食物啊!
反意疑问句练习
1.My mom bought me a medium coke,______? 2.You went to your grandma's home,________?
3.He will go home,________? 4.She doesn't like to eat apples,_______?
5.Your room looks so big,_______? 6.You won't sleep early,_________?
7.Your are never late for school,_______? 8.You watched the football match last week,______?
9.My mother is cooking,__________? 10.Your father plays the computer very well,__________?
11.You were moved by your students,________?12.Jogging makes us healthy,______________?
13.The sewing machine can make the clothes,_____?14.My mother doesn't enjoy smoking,_____?
15.You don't want to bo a teacher in the future,________?16.You look so happy today,________?
三、把下列的句子改为感叹句。(答案不唯一)
⒈ A: Jill is drawing a beautiful picture. B: ___________________________
⒉ A: Mr Wang is a busy man. B: ___________________________
⒊ A: The cat is very happy. B: ___________________________
⒋ A: The tractor is going very slowly. B: ___________________________
⒌ A: He is very lucky .B: ___________________________
⒍ A: It is a wet day today. B: ___________________________
⒎ A: They started early. B: ___________________________
⒏ A: They waited a long time .B: ___________________________
⒐ A: He is wearing a large shirt. B: ___________________________
⒑ A: The dolphin is playing happily. B: ___________________________
⒉ A: Mr Wang is a busy man. B: ___________________________
⒊ A: The cat is very happy. B: ___________________________
⒋ A: The tractor is going very slowly. B: ___________________________
⒌ A: He is very lucky .B: ___________________________
⒍ A: It is a wet day today. B: ___________________________
⒎ A: They started early. B: ___________________________
⒏ A: They waited a long time .B: ___________________________
⒐ A: He is wearing a large shirt. B: ___________________________
⒑ A: The dolphin is playing happily. B: ___________________________