课件27张PPT。Unit 2RobotsGrammar1. Master the grammar
2. Use the correct form of the passive infinitive.1. The passive infinitive
2. Help the students to use the passive infinitive correctly in different situations.Go over the passive voice
be + past participle
(be + -ed)The toy is made in China.
My lunch was eaten by the dog.ReviewGo over the infinitive
to do Except predicate, the infinitive can fun_ction as subject, object, predicative, attribute, adverbial and object compliment.GrammarThe form of passive infinitive
to be + past participle当不定式动词与其逻辑主语之间是被动关系时,不定式要用被动语态。其构成形式
如:
to be given
to be shut
to be openedGrammarShe hates to be laughed at.
2. I am expecting to be given a pay-rise next month. others laugh at her ;
she is laughed at by others.give me a pay rise;
I will be given a pay rise.For Example3. I am fortunate. He gives me a lot of help.
4. I am fortunate. He has given me a lot of help.I am fortunate to be given a lot of help. I am fortunate to have been given a lot of help.For Examplebe to + passive infinitive (to be + past participle) is often used in notices and instructions. This cover is not to be removed.
The medicine is to be taken three times a day.E.g.For Example完成式进行式一般式被动语态主动语态不定式完成进行式 to do to be done to be doing to have done to have been done to have been
doingReview主动语态一般式表示不定式的动作与谓语动作(几乎)同时发生,或发生在谓语动作之后.A. They pretended not to see us.B. He ordered the bridge to be built within the month. 一般被动式表示不定式动作的逻辑主语是不定式动作的________, 又表示其动作与谓语动词的动作__________或在______发生.承受者同时发生其后特点:特点:不定式的一般式:Passive Infinitive主动语态完成式表示不定式的动作发生在谓语动作之前.A. She pretended to have known it before.B. She was glad to have been given so much help. within the month. 完成被动式表示不定式动作的逻辑主语是不定式动作的________, 又表示其动作发生在谓语动词的动作之____.承受者前特点:特点:不定式的完成式:Passive Infinitive主动语态小结:
当非谓语动词的逻辑主语为动作的承受者时, 须用被动式。弄清非谓语动词与其逻辑主语之间的执行与承受关系是掌握非谓语动词语态的关键。 Passive InfinitiveTo see is to believe.
To be obeyed was natural to her.作主语My job is to help the patient.
Her dream is to be sent to study abroad.作表语观察并判断带有下划线的不定式在句子中所起的作用, 注意主动态与被动态的差异:(1)(2)The workers demanded to get better pay.
I should like to have been told the result earlier作宾语The teacher told me to clean the blackboard.
The captain ordered the flag to be hoisted (升起).作宾语补足语 (3)(4)I have something to say.
She was the first woman to have been elected to such a post.作定语I came here to see you.
He has returned only to be sent away again.作状语(5)(6)主动形式表示被动意义1.在need,want,require等词的后面,动名词用主动形式表示被动意义,其含义相当于动词不定式的被动形式。The house needs repairing.
The house needs to be repaired.2.形容词worth后面跟动名词的主动形式表示被动含义,但不能跟动词不定式;而worthy后面跟动词不定式的被动形式。The picture-book is well worth reading.
The picture-book is very worthy to be read.不定式在名词后面作定语, 不定式和名词之间有动宾关系, 又和句中另一名词或代词构成主谓关系时, 不定式的主动形式表示被动含义.He has a lot of homework to do.
I have something to do this afternoon.
I’ll go to the post office. Do you have a letter to be posted?
( 此处用不定式的被动语态作定语表明 you 不是 post 动作的执行者。) 3.compare:在某些“形容词+不定式”做表语或宾语补足语的结构中,句子的主语或宾语又是动词不定式的逻辑宾语时,这时常用不定式的主动形式表达被动意义。
这些形容词有:nice, easy, fit, hard, difficult, important, impossible, pleasant, interesting 等。This problem is difficult to work out .
(可看作 to work out 省略了 for me).4.在too…to…, enough…to…结构中,不定式可用主动形式或被动形式表示被动含义, 但常用主动形式表示被动意义, 因为此时不定式前面可加逻辑主语。 This book is too expensive to be bought.
This book is too expensive (for me) to buy.The house is big enough to be lived in.
The house is big enough (for us) to live in.5.在there be…句型中,当动词不定式修饰名词作定语时,不定式用主动形式作定语,重点在人; 用被动形式作定语,重点在物。There is no time to lose.
(用to lose可看成for us to lose)
There is no time to be lost.
(用to be lost,谁 lost time不明确)由于古英语的影响,下列动词rent, blame, let (出租)等仍用不定式的主动形式表示被动意义。Who is to blame for starting the fire?
The flat is to rent.6.I have three letters _________(write).
He doesn’t have enough _________ (drink).
I’ll go to Beijing tomorrow. Do you have anything ____________(take) there?
I’ll go to Beijing tomorrow. Look! I have a lot of things ________( take) there不是主语you发出的不定式动作,主语请别人做的。 是主语I发出的不定式的动作 to writeto drinkto be takento take1.2.3.4.Practice1. Having a trip abroad is certainly good for the old couple, but it remains____ whether they will enjoy it.
A. to see B. to be see C. seeing D. seen2. I hurried to the meeting hall, only____ that the meeting had been put off.
A. to tell B. to be told C. telling D. toldPractice3. Do let your mother know all the truth, she appears____ everything.
A. to tell B. to be told
C. to be telling D. to have been told4. Little Tom should love____ to the theater this evening.
A. to be taken B. to take
C. being taken D. taking5. With a lot of problems____, the newly-elected president is having a hard time.
A. settled B. settling
C. to settle D. being settled6. He___ and was made to repeat it.
A. didn’t understand
B. didn’t be understood
C. wasn’t understand
D. wasn’t understood7. The pupils here____ all kinds of exercises every day in the past four weeks.
A. kept busy doing
B. keep on doing
C. have kept busy doing
D. have been kept busy doing8. Visitors____ not to touch the exhibits.
A. will request B. request
C. are requesting D. are requested9. In some parts of the world, tea ____ with milk and sugar.
A. is serving B. is served
C. serves D. served10. ----Have you moved into the new flat?”
----Not yet. The room____. A. has been painted B. is painted C. paints D. is being painted 1. Review the grammar.
2. Finish the Ex1 and 2 on Page 14.
3. Prepare the passage, A Biography of Isaac Asimov.