2、To see is to believe.
作定语
位置： 放在被修饰词的后面 I have a lot of work to do.
I want to find something to drink.
不定式为不及物动词时后面应有必要的介词。 I’m looking for a hotel _________. D A. stay B. stay at C. to stay D. to stay at
（表语） His dream is to travel all over the world.
下列不定式作何种成分？
He was glad to see you.（状语） My father offered to buy a computer for me.
（宾语） He interviewed detective Ken to get some information . （状语） The doctor asked him to have more fruit and vegetables. （宾语补足语）
2、prefer …to… 比起……来更喜欢
比起游泳来，我更喜欢跑步。
I prefer ________ running to ___________. swimming
3、look forward to 期待，盼望
I’m looking forward to _______ visiting (visit) Beijing again.
介词 to 与不定式 to 的区别
1、习惯于be used to _______ doing
被用于be used to _______ do
Water is used to _____ put (put) out fires.
I am used to _______ taking (take) a walk after supper.
to go out 2、I happened ________when he called me. （出去） to depend on others (依赖别人） 3、I don’t want________________. how to drive a car (怎样开车） 4、Sam is learning________________. to protect the environment.(保护) 5、We promise __________
2、动词+宾语+不带to的不定式
动词多为感官动词、使动词。
一感：feel
二听：hear, listen to
三使：make, let, have
四看：see, notice, watch, look at
John’s mother makes him play the piano every day. 被动： John _________ is made to play the piano every day.
table. (buy)
to carry the box for you. 4、It is my pleasure _________
(carry)
练习
5、轮到我们打扫教室了。
It is our turn_________________________ to clean the classroom.
He hasn’t got a house to live_____. in
with I have no pens to write _______.
作状语
1、原因状语:
主语 + be + adj.(表情感) + to do sth.
(happy/ glad angry / sorry / sad /afraid 等)
(enter /to enter ) to come 4、Please tell her _________here on time . (come / to come)
solve 5、I’ll help you to _________this problem. (to solve /solve )
我的梦想是成为一名歌手。 他的工作是每天清扫教室。
1、My ambition is to be a singer.
2、His work is to clean the classroom every day.
2、谚语中 1、To know everything is to know nothing.
动词不定式
动词不定式的结构
肯定： to + V.原 或者 (to)+ V.原
否定：not/never + (to) + V.原 1) He likes to read novels. 2) I saw him come. 3) We decided not to buy that house. 4) It is interesting to fly a kite. 5) Please let him not go there.
作宾补-对宾语进行补充说明
1、动词 + 宾语（sb./sth.) + to do sth. 1、The teacher asked her to answer the question.
2、The doctor told me to have a good rest.
常用动词有：ask, tell, allow, want 等
作主语
3、It is + n. (for sb) to do sth.
It is my pleasure to help you with your English.
作主语
4、用在谚语中
To see is to believe. To say is easy, but to do is hard.
浪费时间就是缩短生命。
6、To waste time is to shorten life. （翻译成中文）
作宾语
1、动词+ to do sth.
常用动词有： want / wish / like / would like / hope / plan / try / decide / learn / need / agree / begin / start / forget / remember / manage / seem / fail/ manage/ promise等
which book to buy She can’t decide_________________.
=She can’t decide which book she should buy.
练习
to turn off the light 1、Don’t forget _________________.( 关灯)
练习
finish the work at once. 1、Let him _______
(finish / to finish)
2、Do you like listening to other people______? talk
(talk / tseen _________the room. to enter
6、 I wish you will stay with us.(改成简单句）
I wish you to stay with us.
7、Her story made us laugh. (改成被动句） We were made to laugh by her story.
作表语
1、主语 + be + to do sth 主语多为 duty / wish / hope / idea / plan / ambition/ dream / work / job 等 名词
1、I hope to finish it tomorrow .
2、She plans to go and teach in the country.
作宾语
2、动词＋疑问词+to do
1、我不知道接下来该做什么。
I don’t know____________ next. what to do
2、她不能决定买哪本书。
动词不定式可以充当的句子成分
1、作主语 2、作宾语 3、作宾语补足语 4、作表语 5、作定语
6、作状语
下列不定式作何种成分？
All I did was to give him some advice（表语） . Lucy needs a friend to play with （定语） .
He was the last guest to arrive .（定语） It’s interesting to read a science fiction . （主语）
作主语
To hear your voice is so nice. It is so nice to hear your voice. To study hard is very important. It is very important to study hard. 注意:
不定式作主语时，通常用it作形式主语， 把真正的主语放在后面。
练习
for 1、It is necessary ______us to learn to wait.
(of/for)
2、It was careless ______me to break the cup . of
（of/for)
to buy 3、It took them 1,000 yuan _________this
___________________.( to further their studies 深造学习)