it的用法总结课件- 高三英语一轮复习.pptx

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1、“it”的用法的用法Grammar一、一、“it”的一般用法的一般用法一、代词一、代词it 判断下列代词的用法判断下列代词的用法 1.The pen is beautiful and it is mine it是第是第_人称，指代人称，指代_ 2.My pen is missing and I cant find it.it是第是第_人称，指代人称，指代_ 3.This is my new pen.I bought it yesterday.it在句子中作在句子中作_语，指代上文的语，指代上文的_ 4.-Whose umbrella is that?-It is Marrys it在句子中作在

2、句子中作_语，指代上文的语，指代上文的_ 三三the pen三三my pen宾宾this主主that5.Is it a boy or a girl?it是第是第_人称，指代性别不详的婴儿人称，指代性别不详的婴儿 6.The bell is ringing.It must be the postman.it是第是第_人称，指代身份未确定的一个人人称，指代身份未确定的一个人三三三三 7.It is Sunday today.It 指指_ 8.It is three oclock now.It 指指_ 9.It was raining this morning.It 指指_ 10.It is in

3、the two miles to the beach.It 指指_ 11.It is 40 degrees Celsius outdoors.It 指指_ 12.It was very quiet at the moment.It 指指_日期日期时间时间天气天气距离距离温度温度环境环境归纳总结：归纳总结：1.代替前文提到过的事物、前文的指示代词（代替前文提到过的事物、前文的指示代词（that,this)。（如（如1-4）2.指代性别不详的婴儿、身份未确定的一个人指代性别不详的婴儿、身份未确定的一个人.（如（如5-6）3.指日期、时间、天气、距离、温度、环境情况指日期、时间、天气、距离、温度、环

4、境情况.(如如7-12)区别it.that.one用法1.The couple bought a new house but it(=the house)will need a lot of work before they can move in.2.Im moving to the countryside because the air there is much fresh than that(=the air)in the city.3.We have been looking at houses but havent found one(=a house)we like yet.归纳

5、总结：归纳总结：_ 和和_ 都替代都替代“the+单数名词单数名词”，都是特，都是特指，都可替代可数和不可数名词，但指，都可替代可数和不可数名词，但_ 指前面指前面提到的提到的“同一同一”事物，而事物，而_ 是指前面提到的是指前面提到的“同类同类”事物，含有事物，含有“这这”跟跟“那那”的比较。的比较。_ 替代替代“a+单数可数名词单数可数名词”，表示泛指同类事，表示泛指同类事物中的任意一个物中的任意一个itthatthatitone练习：用it.that.one填空。He give me a pen,and I like _ very much.The weather here is hot

6、ter than _ of Yunnan.I like this kind of pen,so I want to buy _.itthatoneThis apple is small.Please give me a big _.These books are mine.Those _ are Lilys.Where is my new pen?I cant find _.I have lost my umbrella;I think I must buy _.The umbrella you bought is cheaper than _ I bought.thatoneonesiton

7、e附加练习：用附加练习：用it,that,one 填空填空判断“it”的用法:1.Its very quiet in the caf.2.It rained for three days.3.Its three miles from here to the nearest garage.4.A tall man stood up and shook hands.It was captain Lawrie.5.I hear you bought a new bike.Can you show it to me?6.It was five oclock when we got back home

8、yesterday.7.It was dirty and wet below the ship where the slaves were kept.1.1.环境环境2.2.天气天气3.3.距离距离4.4.代表前面提到的人代表前面提到的人5.5.代表前面提到的物代表前面提到的物6.6.时间时间7.7.环境环境 巩固练习巩固练习形式主语形式主语二、二、it 作形式主语作形式主语观察以下句子观察以下句子1.It is amazing that at my age I am still fit.2.It is said that he had passed the exam.3.It is a pi

9、ty that he is ill.4.It is easier to fall than to rise.5.It is no use crying over spilt milk.it可以放在句中代替可以放在句中代替_,_ 或或 _ 作形式主语作形式主语从句从句不定式不定式(短语）短语）动名词动名词(短语短语)1.It is amazing that at my age I am still fit.it 作形式主语一作形式主语一句型结构：句型结构：It is+It is+adj.(important,necessary.)+that+sb.+(should)do sth.it it 是形

10、式主语，真正的主语是是形式主语，真正的主语是that that 引引导的从句。导的从句。该句型中，如果形容词是该句型中，如果形容词是important,right,important,right,necessarynecessary等，等，thatthat后的从句中要用虚拟语气后的从句中要用虚拟语气（should+should+动词原形），动词原形），should should 可以省去。可以省去。It is important that we(should)learn English well.adj.+that.2.It is said that he had passed the exa

11、m.it 作形式主语二作形式主语二句型结构：句型结构：It is+译为译为 “据说据说,据报道，据悉据报道，据悉”that”that引导的从句是真正引导的从句是真正 的主语的主语 done(said,reported.)+that.3.It is a pity that he is ill.it 作形式主语三作形式主语三句型结构：句型结构：It is+该句型中，该句型中，thatthat后的从句一般用虚拟后的从句一般用虚拟语气（语气（should+should+动词原形），动词原形），shouldshould可省去可省去,表示出乎意料，常译为竟然表示出乎意料，常译为竟然。n.(a pity,a

12、 shame.)+that.4.It is easier to fall than to rise.it 作形式主语四作形式主语四句型结构：句型结构：It is+it it 作形式主语，代替真正的主语作形式主语，代替真正的主语 to do sth.to do sth.adj.+to do sth.5.It is no use crying over spilt milk.it 作形式主语五作形式主语五句型结构：句型结构：It is+该句型中的真正主语是动名词短语该句型中的真正主语是动名词短语,译为译为“做做.是没有用是没有用/好处的好处的”。no use/good+doing sth.1.It

13、 is+adj.+that.2.It is+adj.(important.)+that+sb.+(should)do sth.3.It is+done(said.)+that.4.It is+n.(a pity.)+that.5.It is+adj.+to do sth.6.It is no use/good+doing sth.总结：总结：it作形式主语的常见句型作形式主语的常见句型1.We think it important to learn English.2.I would appreciate it if you could come to my birthday party.3.

14、You may depend on it that we shall always help you.it作某些动词（作某些动词（make,think,find,consider.）的宾语）的宾语某些表示某些表示“喜、怒、哀、乐喜、怒、哀、乐”的动词（的动词（like,enjoy,hate,appreciate.）往往用）往往用it作形作形式宾语，再加上式宾语，再加上if/when等引导的宾从。等引导的宾从。某些动词短语（某些动词短语（ask for,depend on,insist on.）后常用）后常用it作形式宾语。作形式宾语。为保持句子结构平衡，避为保持句子结构平衡，避免头重脚轻，常用免头重脚轻，常用it代替代替不定式、动名词或从句不定式、动名词或从句在在句中作形式宾语。句中作形式宾语。it 作形式宾语作形式宾语