高二英语Unit2不定式课件.ppt（纯ppt,不包含音视频素材）

1、Unit 2 GrammarThe Passive Infinitive(动词不定式的被动态动词不定式的被动态)Teaching Aim:比较动词不定式主动态与被动态用比较动词不定式主动态与被动态用法上的相同与不同之处法上的相同与不同之处,从而更进一步从而更进一步掌握好动词不定式掌握好动词不定式.完成式完成式进行式进行式一般式一般式被动语态被动语态主动语态主动语态不定式不定式-完成进行式完成进行式 to do to be done to be doing to have done to have been done to have been doingStep 1 RevisionDo you

2、 remember the following form?他们假装没看到我们他们假装没看到我们.(1).They pretended(2).He pretended(3).She pretended(4).She is said to他假装在睡觉他假装在睡觉.她假装之前已经知道这件事她假装之前已经知道这件事.据说她研究这问题有好多年了据说她研究这问题有好多年了.Please translate:一般式一般式进行式进行式完成式完成式完成进行式完成进行式not to see us.to be sleeping.to have known it before.have been working on

3、the problem for many years.一般式表示不定式的动作与谓语动作（几乎）同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时发生，或发生在谓语动作之后.完成式表示不定式的动作发生在谓语动作之前完成式表示不定式的动作发生在谓语动作之前.Step 2 Please compare:A.They pretended not to see us.B.He ordered the bridge to be built within the month.A.She pretended to have known it before.B.She was glad

4、to have been given so much help.一般被动式表示不定式动作的逻辑主语是不定一般被动式表示不定式动作的逻辑主语是不定式动作的式动作的_,_,又表示其动作与谓语动词又表示其动作与谓语动词的动作的动作_或在或在_发生发生.完成被动式表示不定式动作的逻辑主语是不定式完成被动式表示不定式动作的逻辑主语是不定式动作的动作的_,_,又表示其动作发生在谓语动词又表示其动作发生在谓语动词的动作之的动作之_._.承受者承受者同时发生同时发生其后其后承受者承受者前前小结小结:当非谓语动词的逻辑主语为动作的承受者时当非谓语动词的逻辑主语为动作的承受者时,须用须用被动式。弄清非谓语动词与其

5、逻辑主语之间的执行与承受被动式。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。关系是掌握非谓语动词语态的关键。特点特点:特点特点:特点特点:特点特点:Step 3.语法功能语法功能To see is to believe.To be obeyed was natural to her.主语主语My job is to help the patient.Her dream is to be sent to study abroad.表语表语 根据已学知识根据已学知识,观察判断以下有下划线的不观察判断以下有下划线的不定式在句子中所起的作用定式在句子中所起的作用,注意主动

6、态与被动态注意主动态与被动态的差异的差异:(1).(2).The workers demanded to get better pay.I should like to have been told the result earlier宾语宾语The teacher told me to clean the blackboard.The captain ordered the flag to be hoisted(升起升起).宾语补足语宾语补足语(3).(4).I have something to say.She was the first woman to have been electe

7、d to such a post.定语定语I came here to see you.He has returned only to be sent away again.状语状语(5).(6).Step 4 Attention!以下主动形式表示被以下主动形式表示被动意义动意义:在在need，want，require等词的后面，动名词用等词的后面，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。式的被动形式。The house needs repairing.=The house needs to be repaired形容词形容词w

8、orth后面跟动名词的主动形式表示被动含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；而义，但不能跟动词不定式；而worthy后面跟动词后面跟动词不定式的被动形式。不定式的被动形式。The picture-book is well worth reading=The picture-book is very worthy to be read12不定式在名词后面作定语不定式在名词后面作定语,不定式和名词之间不定式和名词之间有有动宾动宾关系关系,又和句中另一名词或代词构成又和句中另一名词或代词构成主主谓谓关系时关系时,不定式的主动形式表示被动含义不定式的主动形式表示被动含义.He ha

9、s a lot of homework to do.I have something to do this afternoon.试比较：试比较：Ill 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此处用不定式的被动语态作定语表明明you不是不是post动作的执行者。动作的执行者。)3.在某些在某些“形容词不定式形容词不定式”做表语或宾语补足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语的结构中，句子的主语或宾语又是动词不定式的式的逻辑宾语逻辑宾语时，这时常用不定式的主动形式时，这时常

10、用不定式的主动形式表达被动意义。这些形容词有表达被动意义。这些形容词有nice,easy,fit,hard,difficult,important,impossible,pleasant,interesting等。等。This problem is difficult to work out.（可看作（可看作to work out省略了省略了for me）.4.1.Having a trip abroad is certainly good for the old couple,but it remains _ whether they will enjoy it.(NMET2002)A.to

11、 see B.to be seen C.seeing D.seen2.While shopping,people sometimes cant help _ into buying something they dont really need.（上海（上海1996）A.to persuaded B.persuadingC.being persuaded D.be persuaded3.I feel it is your husband who _ for the spoiled child.（上海（上海2002）A.is to blame B.is going to blameC.is to

12、 be blamed D.should blameBCAStep 5 Exercises4.It is difficult for a foreigner _ Chinese A write B to write C to be written D written5.I have no more letters _，thank youA to type B typingC to be typed D typed6.-What do you think of the book?-Oh,excellent.Its worth _ a second time.A.to read B.to be re

13、ad C.reading D.being read 3.Do let your mother know all the truth,she appears_ everything.BCC 7.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 toldD 8.It is said that plastics can be used to_ many things.Now people are used to_ pla

14、stics products.A.make;using B.making;using C.making;use D.make;useA 9.With a lot of problems_,the newly-elected president is having a hard time.A.settled B.settling C.to settle D.being settledC10.The pupils here_ all kinds of exercises every day in the past four weeks.A.kept busy doing B.keep on doi

15、ng C.have kept busy doing D.have been kept busy doingDStep 6 Consolidation:Lets watch a flash to know more about how we can use the Active and the Passive Infinitive(不定式的主动与被不定式的主动与被动态动态)properly in our daily life.Step 7 Homework:Finish Ex2 in Discovering useful structures on P14,Students Book.在在too

16、to,enoughto结构中，不定式结构中，不定式可用主动形式或被动形式表示被动含义可用主动形式或被动形式表示被动含义,但但常用主动形式表示被动意义常用主动形式表示被动意义,因为此时不定因为此时不定式前面可加逻辑主语。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.在在there be句型中，当动词

17、不定式修饰名句型中，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，重词作定语时，不定式用主动形式作定语，重点在人点在人;用被动形式作定语，重点在物。用被动形式作定语，重点在物。There is no time to lose.(用用to lose可看成可看成for us to lose)There is no time to be lost(用用to be lost，谁，谁 lost time不明确不明确)由于古英语的影响由于古英语的影响,下列动词下列动词 rent,blame,let(出出租租)等仍用不定式的主动形式表示被动意义。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/let.6.7.