文档介绍：动词不定式
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可编辑课件PPT
即to do ，其否定形式是not to do；不定式没有人称和数的变化。
动词不定式:
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可编辑课件PPT
3
可编辑课件PPT
’s normal to cry when we feel sad.
(做主语)
不定式做主语时,常用代词it 来代替不定式结构, 这时 it 被称为形式主语,.
. To learn English well is not easy.
= It’s not easy to learn English well.
It’s + adj. (+for sb.) +to do sth.
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可编辑课件PPT
1. 不定式做主语：
常用句型：It’s + adj. (+for sb.) + to do sth.
（对某人来说）做某事是怎样的
形式主语
真正主语
=To work out the problem is difficult for me.
It’s difficult for me to work out the problem.
=Working out the problem is difficult for me.
. 对我来说解答出这道题是很难的。
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可编辑课件PPT
2. The best way to learn English is to read loudly.
(做表语)
可与be动词构成系表结构.
Her wish is to study in Ji Yan Middle school.
My job is to clean the streets.
在形式上，位于系动词后的就是表语。从含义上讲，表语是回答主语“是什么” 的语法成分。
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可编辑课件PPT
2. 不定式做表语：
常放在be动词后，表明主语“是什么”。
. Our plan is to go there by plane.
我们的计划是乘飞机去那儿。
（主语和表语指代的是同一事物）
job is _________computers.
to selling B. sell C. to sell
2. Her hobby is ______ (play) football.
to play
= Her hobby is playing football.
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可编辑课件PPT
want to buy a ticket.
(做宾语)
接动词不定式作宾语常见的几个动词是want , plan , hope , decide , begin , start. need , wait ,would like .hate. refuse. wish . prefer , learn. try. like .agree ,fail. be able to do, do/try one’s best to do 等.
. They decided to try again.
The little boy wanted to get to school before 8 o’clock.
3. 不定式做宾语：即动词+to do的结构中，这里的to do就是做宾语
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可编辑课件PPT
friends want ________(book) some tickets to the movie for us.
2. My parents decide _____ (give) me more money.
3. He plans _____ (go) to Beijing for a holiday.
4. The boy hopes ______ (pass) the English exam.
5. My little son is able _____ (read) some words.
6. I’ll try my best _____ (help) you.
7. She would like _____ (become) beautiful.
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可编辑课件PPT
helped us to learn English.
动词不定式作宾语补足语,常见的动词有 tell , ask , get, want , would like , wis