动词不定式专题课件

1、动词不定式,定义,构成,用法,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。,动词不定式 的构成： to+动词原形,动词不定式 的用法,动词不定式具有名词、形容词和副词的特征。因此在句中可以做主语、表语、宾语、宾语补足语、定语和状语。 本单元学习不定式做宾语和宾语补足语。,功能：,作宾语补足语,作宾语,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。如： We hope t

2、o 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。,注意,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

3、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。,动词不定式作宾语的注意事项（2点）,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。,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：as

4、k, 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。,动词不定式作宾语补足语,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。 Lets have a rest. 我们休息一会吧。 I saw him come in

5、. 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）,注 意,动词不定式的否定形式,动词不定式的否定式是在to前加not；不带to的不定式则在动词前加not. 如： Zhang Ming asked me not to stay at home all day. 张明要我不要整天呆在家里。 My mother let me

6、not do it by myself. 妈妈让我不要独自做这件事。,动词不定式专项习题,1. Dont 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.

7、which 4. Im 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

8、as a punishment. A. to wash B. washing C. wash D. to be washing 8. The sitting-room needs _, but itll 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 Yan

9、g advised me _too much, otherwise I would have been drunk. A. not to drink B. to drink C. not drinking D. drinking,参考答案 1. A. forget to do sth . 忘记去做某事。forget doing sth . 忘记做过某事。 2. B. sit on the chair, 其中on不能少。 3. C. it为形式主语。 4. A. allow sb to do 5. D. tell sb, to do,6. B. stop to do 停下去做另一件事。stop doing