初中英语动词不定式讲解及练习
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动词不定式
一. 定义:
动词不定式是非谓语动词的一种,它没有人称和数的变化,在句子中不能独立作谓语,但它仍保持动词的特点,既可以有自己的宾语和状语。同时动词不定式又具有名词、形容词、副词的特征,在句中可以作主语、表语、宾语、宾语补足语、定语和状语。
二. 动词不定式的构成:to+动词原形
三. 动词不定式作宾语
后面能接不定式作宾语的动词有:agree, ask, choose, decide, forget, hope, learn, want, wish, would like等。
We hope to get there before dark. 我们希望天黑以前到那儿。
The girl decided to do it herself. 那个姑娘决定自己做那件事。
动词不定式作宾语的注意事项(2点)
1. 有些动词既可跟不定式作宾语,也可跟动名词作宾语,但含义不同:
remember to do 记住要做某事 remember doing 记得曾经做过某事
forget to do忘记要做某事 forget doing 忘记曾经做过某事
stop to do 停下来去做某事 stop doing 停止做某事
go on to do 继续做另一件事 go on doing 继续做原来在做的事
I remember seeing you somewhere before.
我记得以前在哪儿见过你。
Please remember to turn off the light when you leave.
离开时请记得关好灯。
2. 不定式作宾语时,如带有宾语补足语,则要把不定式放到后面,用it作形式宾语,构成“主语+动词+it+宾补(形容词、名词)+不定式”结构。
如:He found it very difficult to get to sleep. 他发现很难入睡。
四. 动词不定式作宾语补足语
1. 后面能接to不定式作宾语补足语的动词有:ask, order, teach, tell, want, wish, help 等。 The teacher told us to do Exercise 1. 老师要我们做练习一。
I want both of you to go. 我要你们俩去。 We helped her (to) repair her bike. 我们帮助她修理自行车。
2. 使役动词let, have, make及感官动词see, watch, notice, hear, feel等要以不带
to的不定式作宾补。
Let’s have a rest. 我们休息一会吧。I saw him come in. 我看见他进来了。
感官动词后既可跟不带to的不定式作宾补,也可跟v-ing作宾补,前者表示动作的全部过程已结束;后者表示动作正在进行。
I saw him come downstairs.我看见他下了楼。(说明他下楼了这件事)
I saw him coming downstairs.我看见他在下楼。(说明他下楼时的情景)
( ) 1. I often see Tom on the playground. When I passed the playground yesterday, I saw him .
A. play; playing
B. to play; play
C. playing; to play C. playing; play
( ) 2. — What does the sign on the bottle mean?
—It means “”.
A. This side up
B. Dangerous
C. Recyclable
D. No Parking
( ) 3. When the player finished running, he was out of .
A. breather
B. breathing
C. breath
D. the breath
( ) 4. — How about going hiking this weekend?
— Sorry, I prefer rather than .
A. to stay at home; go out
B. to go out; stay at home
C. staying at home; go out
D. going out; stay at home
( ) 5. —We really shouldn’t use plastic bags any more whe n shopping.
—It’s important to protect our environment.
A. So does it.
B. With pleasure.
C. That’s OK.
D. So it is.
( ) 6. —
— To the supermarket with Wang Fan.
A. Where have you gone?
B. Where did you go to the supermarket?
C. Where have you been?
D. Where’s Wang Fang?
( ) 7. I afraid of the dark, but now I don’t.
A. use to
B. used to
C. use to be
D. used to be
( ) 8. The earth is years old.
A. four thousands six hundreds
B. four thousand six hundred
C. four thousand and six hundred million
D. four thousand six hundred millions
( ) 9. They have made so great progress .
A. three years ago
B. for three years
C. in the past three years
D. before three years
( ) 10. — Has Li Hong gone to the library?
— Pardon?
— I asked the library.
A. if Li Hong had gone to
B. if had Li Hong gone to
C. Li Hong had gone to
D. has Li Hong gone to
( ) 11. — Oh, Miss Wei. Your skirt looks nice. Is it new?
— No, I it since three years ago.
A. had
B. bought
C. have had
D. have bought
( ) 12. — Must they clean and tidy the classroom now?
— No, they . It after school in the afternoon.
A. mustn’t; must clean
B. needn’t; must clean
C. mustn’t; need be cleaned
;D. don’t have to; can be cleaned
( ) 13. —It’s one o’clock now. I must go.
—It’s raining outside. Don’t leave it stops.
A. when
B. since
C. while
D. until