人教英语选修7Unit2Learning about language （共28张PPT）

(共28张PPT)
Unit 2 Robots
人教版新课标选修7
The keys to the ex. 1
pleasure, tried
pity
go away
wish
digital
6.looked at
7.ridiculous
8.stated
satisfaction, tested out
sympathy
leave…alone
desire
ring…up
scanned
absurd
declared
Checking answer – I (2m)
The keys to ex. 2 :
scan
favour
cushions/beddings
beddings/cushions
clerks
awful
turn around
alarms
declaring
Checking answer – II (5m)
Grammar
-----Passive infinitive
一.复习被动语态（Revise the Passive Voice）
英语动词有主动语态（the active voice）和被动语态(the passive voice)两种形式.主动语态表示主语是动作的执行者；被语态表示主语是动作的承受者.如：
Everyone enjoys exciting sports.（主动语态） Exciting sports are enjoyed by everyone.(被动语态)
转换规则：
用公式表示为:(主动)S+V+O S(O)+V(be+ V -ed)+ by+O(S)，如：
Miss Li is teaching music now.
Music is being taught ( by Miss Li) now.
时
式
二.常见主被动时态变化一览表
am/is/are being given
has/have been given
was/were being given
had been given
shall/will have been given
一　般 进　行 完　成

现　在 am/is/are given

过　去 was/were given

将　来 shall/will be given
1.English is spoken all over the world.
2.The water is being turned into vapour.
3.Those rooms have not been cleaned yet.
4.He was seen to enter the room.
5.At that time they were being shown how to run the machine.
6.Radios had just been invented then, and people were talking about sending pictures by electricity.
7.Madame Curie will always be remembered as the discoverer of the element radium.
8.Before you come back, the building will have been finished.
不定式被动式的用法:
不定式与其逻辑主语之间是被动关系时,要用不定式的被动式.不定式的一般被动式即表示其逻辑主语是不定式动作的承受者,又表示其动作与谓语动词的动作同时发生或在其后发生;不定式的完成被动式即表示其逻辑主语是不定式动作的承受者,又表示其动作发生在谓语动词的动作之前.
Eg.
He ordered the bridge to be built within the month.
他命令在月内建成这座桥.(一般被动式)
She was glad to have been given so much help.
得到如此多的帮助,她很高兴.(完成被动式)
三.动词不定式的主动被动结构变化一览表
to be done
to have been done
一般式 进行式 完成式

主　动
to do
to be doing
to have done

被　动


(1)The meeting to be held is of great importance.
(2)The bridge to be built next year is just between the one built last year and the one being built now.
(3)This house seems to have been built by a good architect.
More examples:
通常在believe, suppose, say, report等动词构成的句子中可以进行主动语态到被动语态以及被动语态和动词不定式的转换.如：
They say that Mike is sick in bed.
It is said that Mike is sick in bed.
Mike is said to be sick in bed.据说麦克卧床不起.
People believe that he was killed.
It is believed that he was killed.
He is believed to have been killed.
大家相信他被杀了.
单项选择:
To fetch water before breakfast seemed to be a rule ________.
to never break
B. never to be broken
C. never to have broken
D. never to be breaking
B
2. The tools in the workshop are not allowed ______.
A. taking out
B. to take out
C. to be taken out
D. being taken out
C
3.The dam _____ by the year 2010, will benefit the whole country.
being completed B. to complete
C. completed D. to be completed
4.Here we found little snow, as most of it seemed _____ blown off the mountain.
to have been B. to be
C. that it was D. that it had been
D
A
5.He said such a thing ought ____ to happen.
to be not allowed B. not to be allowing
C. not to have allowed D. not to be allowed
6.She told me that her proposal needed _____ into consideration.
to take B. to be taken
C. to be taking D. to have taken
D
B
7. The local health organization is reported ______ twenty-five years ago when Dr. Adudon became its first president.
to be set up B. being set up
C. to have been set up D. having been set up
C
8. Large sums of money ____ each year in painting the steelwork of bridges, ships, and other exposed structures.
A.have spent
B. have to be spent
C. have to spend
D. spend
B
高考链接:
1.The flu is believed _____ by viruses that like to reproduce in the cells inside the human nose and throat.
causing
B. being caused
C. to be caused
D. be have caused
C
2.The news reporters hurried to the airport, only ____ the film stars had left.
A.to tell
B. to be told
C. telling
D. told
B
3. Little Jim should love _____ to the theatre this evening.
To be taken B. to take
C. being taken D. taking
4.The chair looks rather hard, but in fact, it is very comfortable to _____.
A. sit B. sit on C. be sat D. be sat on
A
B
Revising useful structures
Answer key for Exercise 1 on page 14:
be tested out
be harmed
be offered
was amazed
was not allowed
be discovered
be completely transformed
were impressed
be envied
be rebuilt
Answer key for Exercise 2 on page 14:
to be designed
to be rebuilt
to be accompanied
to be known as
to be filled with
to be tested out
to be envied
to be set aside
were listed
be divided
be organized
to be accompanied
were connected
be surrounded
was attached
Answer key for Exercise 3 on page 14:
Rules for polite behaviour in China.
1.It is impolite to leave before elderly people in public.
2.To interrupt your parents’ conversation is considered rude.
3.It is polite for you to stand up when you are talking to an older person.
Answer key for Exercise 4 on page 14:
Assignment
Go over key words and expressions.
Go over the grammar.
Do ex. 3 on Page 56.