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1、新人教版高二英语选修六it用法授课课件It的用法词知识要点知识要点 It的用法的用法（一）作人称代词1、it代替前面（或后面）的单数名词或分句等所表示的事物。e.g.You cannot eat your cake but have it.（it代替前面的cake）Although we cannot see it,there is air all around us.（it代替后面的air）They say he has left town,but I dont believe it.（it代替前面Theytown分句中的情况）返回目录知识要点知识要点 2、代替有生命但不能或不必分阴阳性的东
2、西（包括婴儿）。e.g.Yesterday we saw a big tree.It was fully twenty metres high.（it代替前面的tree）The baby cried because it was hungry.（it代替前面的baby）返回目录知识要点知识要点 3、在某些习惯说法中，可以代替人。e.g.-Someone is knocking at the door,Peter.-Who is it?-Its me.-Who are singing?-It is the children.-The light is still on in the lab.It
3、 must be the third-year students doing the experiment.返回目录知识要点知识要点 4、it与one的区别：这两个词都可以代表前面说过的名词，但it用于同名同物的场合；one则用于同名异物的场合。e.g.-Do you still have the bicycle?-No,I have sold it.-Is this knife yours?-No.It is Xiao Zhangs.Mine is the one on the desk.返回目录知识要点知识要点 5、it与that的区别：两词都可代替某一特定名词，但that指同一类，并非同
4、一个。e.g.The climate of South China is mild（温和的）;I like it very much.（it指the climate of South China）The climate of South China is much better than that of Japan.（that指the climate）返回目录知识要点知识要点（二）作无人称代词it作无人称代词时，除了句中找不到它所代表的词语外，另一个特点是它后面的内容都是表示天气、时间、距离、度量衡及情况等。It is fine(rainy,windy,etc.).It is noon.It
5、is a half hours walk to the factory.It is eighteen square metres in area.What does it matter?返回目录知识要点知识要点（三）作强调词，构成强调结构用以帮助改变句子结构，使句子的某一成分受到强调。“It is(was)+所强调的成分+that(who)+其它成分。”在这个句型中，it本身没有词义。注意:在强调结构中，如被强调部分为时间状语或地点状语，其后的连接词也绝不能为when 或where，而应用that。在复习中，一定要注意句式的不同。返回目录It was in Shanghai that I bo
6、ught the guitar(that引起强调句)It was Shanghai where I bought the guitar(where引起定从)It was twelve oclock when we arrived there(when引起时间状语从句）It was at twelve oclock that we arrived there.（that 引起强调句）返回目录知识要点知识要点（四）引导词it作形式主语（宾语）为了使句子平衡，常采用形式主语（或宾语）it，而把真正的主语（或宾语）置于句子后面。通常引导词it与它所代替的句子成分中间要夹有某些词。e.g.It take
7、s half an hour to go there on foot.（It与to go there on foot之间夹有takes half an hour四个词）We thought it strange that Mr.Smith did not come last night.（it与that从句中间夹有 strange）返回目录但有时it与所替代部分之间并不夹有其它词。e.g.You may depend on it that they will support you.（因为介词on之后一般不直接接that引导的宾语从句。注意：it不是多余的，不能当作错句）知识要点知识要点(五)
8、it，one，that 的区别：作为代词，这三个词的对比使用是高考的热点之一。-Why dont we take a little break?-Didnt we just have _?Ait BthatCone Dthis The Parkers bought a new house but _will need a lot of work before they can move inAthey Bit Cone Dwhich one 用以指代同类事物中的任一，that 特指性强,指代可数与不可数词，而it指代上文提过的同一事物。返回目录高考链接高考链接1.（09四川）6.I like
9、this house with a beautiful garden in front,but I dont have enough money to buy_.A.one B.it C.this D.that【答案】B。【解析】意思是：我喜欢这个前面有一个美丽花园的房子，但是我没有足够多的钱去把它买下来。第一句话中的this house表明在该语境中是特指的用法，所以答案为it，表示特指。该题容易误选one，要注意的是one表示泛指。【考点定位】it/that/one用法区别返回目录高考链接高考链接（09浙江）7Ive read another book this week.Well,may
10、be _ is not how much you read but what you read that counts.A.thisB.thatC.thereD.it【答案】D【解析】句中“not how much you read but what you read”足以做动词count 的主语，所有选D 使之构成强调句型。【考点定位】本题考查强调句型和名词性从句。返回目录高考链接高考链接3.（09北京）2.Being a parent is not always easy,and being the parent of a child with special needs often ca
11、rries with _extra stress.A.it B.them C.one D.him【答案】C【解析】本题较难，但根据句意“作一名家长并不是很容易，并且作为一名有着特殊需要的孩子家长，由于当这种特殊需要的孩子家长而带来额外的压力”。分清指代，it 指代上文being the parent of a child with special needs内容，carry的宾语为extra stress,with it 表示原因，防止误选C.，由此可知选A【考点定位】考查代词it用法。返回目录高考链接高考链接4.（2006年浙江卷，4）_ is our belief that improve
12、ments in health care will lead to a stronger,more prosperous economy.A.As B.That C.This D.It【答案】D.【解析】本题考查it作形式主语，代替that improvements in health care will lead to a stronger,more prosperous economy，而其他选项均不可以充当形式主语。返回目录高考链接高考链接5.（2006年I，26）If I can help_,I dont like working late into the night.A.so B.
13、that C.it D.them【答案】C【解析】此题考查it的特殊用法。it可用于某些动词之后，无确切的含义，构成习语。此处If I can help it意为“如果我有办法的话”。有时我们也可以说成It cant be helped或There is no help for it。表示“实在没有办法”。常见口语中带it 的惯用语：（youve/Ive）got it懂了，明白了;forget it算了吧，别提了，休想，不可能;Dont mention it（别人道谢时回答）不客气;Take it easy别急，慢慢来;“make it+时间”把 定在（某时）;It/all depends那要
14、看情况而定;Its hard to say情况很难说;It comes to nothing没什么结果。返回目录高考链接高考链接6.（2006年安徽卷，34）Catherine bought a postcard of the place she was visiting,addressed to and then posted it at the nearby post officeAit;her Bit;herself Cherself;her Dherself;herself【答案】B【解析】考查代词。第一空不定代词it指代前面的postcard；第二空to后的宾语应为反身代词herself.返回目录高考链接高考链接7.（2007 年天津卷，1）He didnt make _ clear when and where the meeting would be held.A.this B.that C.it D.these【答案】C【解析】考查it作形式主语，it代替when and where the meeting would be held其他选项均不可以充当形式宾语。返回目录