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1、_选修七 Unit 2 RobotsPeriod3 GrammarBefore class:Learn grammar points before the classDuring class:Step 1RevisionAsk students to answer the following questions without referring to the textbook.1What was going to be tested out by Larrys wife，Claire?2How did Larry Belmont finally persuade his wife to ac
2、cept the experiment?3How did Claire feel when she was offered sympathy by a robot?4What did Tony expect to do about the house before he was to leave and Larry was to return?5How did Claire feel when she was envied by those women?6What happened to Tony at last?Step 2Grammar learning1不定式的被动形式当不定式与逻辑主语
3、之间是被动关系时，即不定式的逻辑主语是不定式所表示动作的承受者，不定式一般要用被动形式。其被动式可以分为两种：一般式和完成式。(1)一般式：to be done，表示不定式动作在谓语动词之后或者同时发生。It is a great honor_to_be_invited_to speak here.很荣幸被邀请在这里讲话。The novel is said_to_be_published_next month.据说这本小说下月要出版。(2)完成式：to have been done，表示不定式动作发生在谓语动词之前。The book is said to_have_been_translate
4、d_into six languages.这本书据说已经被翻译成六种语言。The boss preferred_to_have_been_given_more work to do.老板宁愿被分给更多的工作做。被动一般式to be done完成式to have been done2.不定式被动形式的作用(1)作主语Its an honor to_be_invited to the ceremony.很荣幸被邀请赴宴。Its 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。(2)作表语The letter
5、is_to_be_sent_by airmail.这封信笺要空邮。(3)作宾语She didnt 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。(4)作宾语补足语Id like my bedroom to_be_cleaned.我想整理一下我的卧室。(5)作定语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His
6、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。3不定式有些要注意的地方(1)感官动词和一些使役动词的不定式的主动形式要省去to，但在变成被动语态后需要加上to，能这样用的动词或动词词组有：make，have，let，see，hear，notice，listen to，watch等。如：We often see him act like that.He is often seen to act like that.我们常常看到他那样做。(2)在cant help but，have nothing
7、 to do but结构中，介词but后的不定式省去to。如：I cant_help_but suspect his motive.我不禁怀疑起他的动机。I have_nothing_to_do_but_watch TV.我没什么事情可做，除了看电视。(3)不定式有时要用主动形式表示被动意义形容词以及含有形容词的名词后的不定式，一般用主动形式表示被动意义，其中形容词常见的有easy，difficult，important，impossible等。如：The work is impossible_to_finish in two days.工作不可能两天之内完成。 English is not
8、so easy_to_learn.英语并不好学。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。Step 3Exercises1The crowd cheered wildly at the sight of Liu Xiang，who was reported _ the world record in the 110meter hurdle race.ABreaking Bhaving bro
9、ken Cto have broken Dto break2I like getting up very early in summer.The morning air is so good _.Ato be breathed Bto breathe CBreathing Dbeing breathed3_ the project as planned，well have to work two more hours a day.ACompleting BComplete CCompleted DTo complete4Having a trip abroad is certainly goo
10、d for the old couple，but it remains_ whether they will enjoy it.Ato see Bto be seen CSeeing Dseen5I hurried to the meeting hall，only_ that the meeting had been put off.Ato tell Bto be told Ctelling Dtold6Do let your mother know all the truth；she appears_ everything.Ato tell Bto be told Cto be tellin
11、g Dto have been told7Little Tom should love_ to the theater this evening.Ato be taken Bto take Cbeing taken Dtaking8It is said that plastics can be used to_ many things.Now people are used to_ plastics products.Amake；using Bmaking；using Cmaking；use Dmake；use9With a lot of problems_，the newlyelected president is having a hard time.ASettled Bsettling Cto settle Dbeing settledKeys：15 CBDBB 69 DAAC After class:Step 4 HomeworkFinish off Exercises 1 and 2 on Page 56.4_