动词不定式精品课件.ppt
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1、 动词不定式动词不定式 的构成的构成:(not) to+do(动词原形动词原形)A to-infinitive can be used as主语主语(Subject)表语表语(Predicative)宾语(宾语(Object)宾补(宾补(Object complement)定语(定语(Attributive)状语(状语(Adverbial) 不定式用作主语不定式用作主语To grow trees is very important. It is very important to grow trees.不定式作主语时不定式作主语时,往往放在谓往往放在谓语之后语之后,用用it作形式主语。作形式主
2、语。Say in another way, using it.1.To learn from your friends is important.2.To leave without saying goodbye is impolite.3.To chat with Miss White is a pleasant thing.4.To walk to school takes me ten minutes.It is important to learn from your friends.It is impolite to leave without saying goodbye.It i
3、s a pleasant thing to chat with Miss White.It takes me ten minutes to walk to school. It is + adj. + for sb. to do sb. isare +adj. +to do It is + adj. + of sb. to do= sb. isare +adj. +to do你那样做是有礼貌的。 It is polite of you to do that. = You are polite to do that. (good, kind, nice, rude, clever, right,
4、 silly, thoughtful, brave, selfish) (easy, hard, difficult, important, possible, necessary) 对他来说,说英语很容易。对他来说,说英语很容易。 对我们来说,努力学习是必对我们来说,努力学习是必 要的。要的。 您能帮助我,真是太好了。您能帮助我,真是太好了。 It is easy for him to speak English.It is necessary for us to study hard. It is very kind of you to help me.不定式放在be动词后面,用作表语 M
5、y dream is to be a good teacher .Its work is to clean the room every day.Complete the following sentences.1.The doctors suggestion is _(take)more exercise.2.The best way is_(talk) to your parents.3.His plan is _ (今今 年夏天年夏天 到北京旅游到北京旅游).4.My purpose is _(帮你解决这个问题帮你解决这个问题).to taketo talkto travel to Be
6、ijing this summerto help you solve this problem不定式放在及物动词后,用作宾语 We begin to read English at 6:30a.m. She forgot to close the door.常用动词不定式作宾语的动词有:常用动词不定式作宾语的动词有: want, plan, hope,wish, learn, decide,would like, begin, start, try,need, forget, choose,prepare, agree, promise,manage,encourage,Complete th
7、e following sentences.1.I _ (希望收到希望收到来信来信) you soon. 2.John _ (不想当不想当) the host of the charity show.3.Theyre _ (试着解决试着解决) the problem by himself.4.Millions of people _ (已学已学会使用会使用) computers. hope to hear fromdoesnt want to betrying to solvehave learned to usethink/ find / consider+ it+ adj. + to do
8、 动词不定式作宾语动词不定式作宾语的注意事项(的注意事项() 不定式作宾语时,如带有宾语补足语,则要把不不定式作宾语时,如带有宾语补足语,则要把不定式放到后面,用定式放到后面,用it作形式宾语,构成作形式宾语,构成“主语主语+动动词词+it+宾补(形容词、名词)宾补(形容词、名词)+不定式不定式”结构。如:结构。如: I found it necessary to talk to him again. I found it important to learn English.动词不定式作宾语的注意事项(动词不定式作宾语的注意事项()有些动词既可跟不定式作宾语,也可有些动词既可跟不定式作宾语,
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