(共24张PPT)
不定式由“to + do (动词原形)”构成, 其否定形式是“not to do”, 不定式可以在句子中作 ______, _____, _____, _____, _____, _____ 。不定式没有人称和数的变化, 但有 _____ 和 _____ 的变化。
主语
表语
宾语
宾补
定语
状语
时态 语态
to do
to have done
to be doing
to be done
to have been
done
形 式 主 动 被 动
一般式
进行式
完成式
归纳:
逻辑主语是动作的执行者时用 _____ 语态;
逻辑主语是动作的承受者时用 _____语态。
主动
被动
1.He hopes _________(see) you again.
他希望再次见到你。
2.He thought it’s an honor ___________ (invite) to the party.
他认为被邀请参加派对是个荣幸。
to see
to be invited
1. He ordered the bridge __________(build)
within the month.他命令在月内建成这座桥。
2. She was glad _________________(give)so much help.得到如此多的帮助, 她很高兴。
to be built
to have been given
归纳:
不定式动作与谓语动词的动作同时发生或在其后发生用___________________;不定式动作发生在谓语动词的动作之前用 ____________________。
to be done
to have been done
1. The dishes need ____________.
to be washed
wash
2. The mail is intended(准备)
__________.
send
to be sent
4. The house is ________(待售).
sell
to be sold
3. The wall is expected
_____________.
to be painted
paint
1. 作主语(Subject)
It's an honor to be invited to the ceremony.
很荣幸被邀请赴宴。
It's a pity to be kept in the house in such fine weather.
在这样好的天气被关在家里真是遗憾。
注:(1)为了避免头重脚轻,不定式短语作主语时,通常放在谓 语之后,用it作形式主语。
(2)单个动词不定式(短语)作主语时,谓语动词用单数形式。
To be adopted by a key university is difficult for him.
2. 作表语(Predicative)
The letter is to be sent by airmail.
想一想!
不定式被动形式的句法功能:
3. 作宾语(Object)
She didn't like to be treated as a child.
她不喜欢被当成孩子。
The boy asked to be given an opportunity to try again.
那男孩要求给他再试一次的机会。
注:有些动词,如want, need, require意为“需要”时,后面常接动词不定式的被动形式或动名词形式的主动形式。
The house wants to be repaired/repairing.
4. 作宾补(Object Complement)
I'd like my bedroom to be cleaned.
5. 作定语(attribute)
He was the last one to be asked to speak at the meeting.
他是最后一个在会上被邀请发言的人。
6. 作状语(adverbial)
His mother left the small village,never to be seen again.
他母亲离开了那个小山村,再也没有人见过她。
1. It is an honour for me to be asked
to speak here.
2. The task is to be finished by next month.
3. She asked to be sent to work in
Xinjiang.
4. She is sent abroad to be trained.
Identify its function.
(subject)
(predicative)
(object)
(adverbial)
5. Are you going to the meeting to be held in the teachers’ office?
6. She was too young to be assigned such work.
7. He wanted the letter to be typed
at once.
(adverbial)
(object complement)
(attribute)
1.在there be结构中。
There is a lot of homework to do.
(也可用to be done) There is no time to lose (to be lost).
2.在“too…to ; enough…to…”结构中。
The problem is too difficult to work out .
The house is big enough to live in.
不定式的主动形式表示被动意义 的几种常见结构:
Remember!
3.在“n/pron + be + adj + to do”结构中, 一般用主动形式表示被动意义,其中常见的形容词有:easy,difficult,hard,impossible,nice,pleasant,heavy,interesting,important,expensive,cheap, dangerous等。
The work is impossible to finish in two days.工作不可能两天之内完成。
English is not so easy to learn.
英语并不好学。
4.在“with+n+to do”结构中。
With nothing to do,he lay in bed. With so many exercises to do,I can‘t go to the cinema.
5.当不定式的逻辑主语在句中出现时。
I have a letter to type today.
(I是to type的逻辑主语) Do you have anything to say?
(you是to say的逻辑主语)
Remember them!
6、一些固定用法,如“挨骂,受责备,受批评” 用be to blame;“(东西等)出租”用to let。
He is to blame for what he has done.他应为他所做的受责备。
The house is to let.房子要出租。
Practice
1. Visitors____ not to touch the exhibits.
A. will request
B. request
C. are requesting
D. are requested
D
2. I hurried to the meeting hall, only____ that the meeting had been put off.
A. to tell B. to be told
C. telling D. told
3. With a lot of problems____, the newly-elected president is having a hard time.
A. settled B. settling
C. to settle D. being settled
B
C
4. It is said that plastics can be used to____ many things. Now people are used to____ plastics products.
A. make; using
B. making; using
C. making; use
D. make; use
A
5. In some parts of the world, tea ____ with milk and sugar.
A. is serving
B. is served
C. serves
D. served
B
The meeting is said _________________ (cancel).
据说会议取消了。
2. The book is reported _________________ (translate) into many languages.
据报道这本书已经被翻译成很多种语言。
to have been translated
to have been cancelled
3. Knives _______ (use) for cutting things.
4. The building ________ (build) in 1987.
5. Nuclear energy ____________ (use) to
produce electricity by us.
6. Several big modern power plants ____
_______ (build) in our city next year.
7. Your mistakes ____________________
(correct) right now.
8. My bike _______________ (repair) by
Tom now.
are used
was built
has been used
will
be built
should be corrected
is being repaired
Homework
Go over words anexpressions.
Finish the rest exercises.