九年级级下Unit4 Natural disasters教学 grammar课件.ppt
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1、 The special usa of“It”!要点解读要点解读1.作人称代词和非人称代词的用法作人称代词和非人称代词的用法2.作先行代词用法作先行代词用法3.作引导词的用法作引导词的用法能力解读能力解读在正确运用在正确运用itit的基础用法上的基础用法上,重点掌握重点掌握:1.1.作形式主语作形式主语2.2.作形式宾语作形式宾语并能在所给题干提示的语境和逻辑关系中灵活运用并能在所给题干提示的语境和逻辑关系中灵活运用.基本概念和用法基本概念和用法 It It 是一个特殊的代词,是一个特殊的代词,它有两重意义。一是作它有两重意义。一是作为代词,另一个是当作为代词,另一个是当作连接词连接词(引导词
2、引导词)。它可以用来代替事物和前面提它可以用来代替事物和前面提到过的事到过的事,也可以用来表示时也可以用来表示时间间,天气等天气等.还可以用作先行代还可以用作先行代词及引导次词及引导次.具体用法具体用法一.一.作代词作代词:1.1.指代事物或前面提到过的指代事物或前面提到过的事物事物:What is this?It is a picture.It is a lovely and cute panda,isnt it?Yeah.I wont forget it!2.2.指代时间和天气指代时间和天气How is the weather?It is rainy.Whats the time?It i
3、s twenty past two.3.3.指代距离指代距离How far is it from your home to your school?It is only five minutes walk.4.4.表示情况或代替表示情况或代替this,that:this,that:How is it going on with the girl?It must go on with her very well.She is very happy.Whats this?It is a cute dog.P55 A Answer these questions using it as the su
4、bject.1.Whats the weather like today?2.Whats the time now?3.What is the date today?4.What is the season now?5.How far is your home from school?P56 B Put the words in the correct order to make meaningful sentences.1.now/for supper/it/time/is2.autumn/in Australia/now/it/is3.about five kilometres/it/is
5、/to the park4.windy/was/it/yesterdayIt is time for supper now.It is autumn in Australia now.It is about five kilometres to the park.It was windy yesterday.1.1.itit作形式主语作形式主语。英语中不定式、动名词、英语中不定式、动名词、主语从句在作主语时主语往往显得很长,使主语从句在作主语时主语往往显得很长,使整个句子看上去有点整个句子看上去有点 头重脚轻,这样就借头重脚轻,这样就借助助“it”it”来作形式上的主语,而把真正的主来作形式上
6、的主语,而把真正的主语移到句子后边去,使全句看上去平稳一些。语移到句子后边去,使全句看上去平稳一些。“itit”没有实际的意义。没有实际的意义。1)It+be+adj./n.+to do 2)It is easy to climb the hill.3)It is his duty to solve the problem.1.2)It+be+no use/good+gerund(动名词动名词)做某事是没用的。做某事是没用的。It is no using arguing with him.做某事是没好处的。做某事是没好处的。I t is no good going there.2.2.作形式宾
7、语。作形式宾语。这种情况通常只用于能这种情况通常只用于能带以名词或形容词作宾语补语的动词后带以名词或形容词作宾语补语的动词后面。常用于下列句型面。常用于下列句型:feel;think;make;find+it adj./n.+to do E.g.I found it not easy to get on with Jim.We all think it important to learn English well.It It 句型句型:1.It+is/was/has been+一一段时间段时间+since+过去时过去时自从我上次见到他已经有两年了。自从我上次见到他已经有两年了。It is t
8、wo years since I last saw him.我离开学校五年了。我离开学校五年了。It has been three years since I left the school.It It 句型句型:2.It takes/took sb some time to do sth 花费某人花费某人多少时间做某事多少时间做某事他们花了他们花了3年时间盖这栋大楼。年时间盖这栋大楼。It took them 3 years to build the skyscraper.我用了三天读完这本书。我用了三天读完这本书。it took me three days to finish readin
9、g the book.3.It+seems/appears that好像。好像。好像不久有选举。好像不久有选举。It seems that there will be an election soon.看来要下雨了。看来要下雨了。It appears that its going to rain.4.It+be+done(reported/said/told/known)+that 据报道、据据报道、据说、据获悉。说、据获悉。据说他已经出国学习了。据说他已经出国学习了。It is said that he has studied abroad.大家都知道这座大桥要提前完工。大家都知道这座大桥要
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