it用法及引导的重点句型课件.pptx
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1、 1.it作人称代词作人称代词1.1.it的最基本用法是作人称代词,主要指刚提到的事的最基本用法是作人称代词,主要指刚提到的事物,以避免重复物,以避免重复:Ningbo is a beautiful city,isnt it?1.2.也可以指动物或婴儿也可以指动物或婴儿(未知性别的婴儿或孩子未知性别的婴儿或孩子):Is this your dog?No,it isnt.1.3.也可指抽象事物也可指抽象事物:It was a great surprise to me when he did a thing like that2.非人称代词非人称代词itit有时并不指具体的东西,而泛指天气、时间、
2、环境有时并不指具体的东西,而泛指天气、时间、环境等,称为非人称的等,称为非人称的it:2.1.指天气:指天气:It is a lovely day,isnt it?It is a bit windy.第1页/共26页2.2.指时间指时间:It was nearly midnight when she came back.2.3.指环境指环境:It was very quiet in the caf.2.4.指距离:指距离:It is half an hours walk to the city centre.3.it的其他用法的其他用法3.1.表示谁在做某事的句子:表示谁在做某事的句子:Who
3、 is it?-Its me.Her face lighted when she saw who it was.3.2.用来泛指某件事:用来泛指某件事:So you are going to be married this time?When is it?It doesnt matter.It is a shame,isnt it?第2页/共26页.it的重要句型的重要句型1.It is+被强调部分被强调部分+that.该句型是强调句型。将被强调的部分放在该句型是强调句型。将被强调的部分放在前面,其它部分置于前面,其它部分置于that之后,之后,被强调部分可被强调部分可以是主语,宾语,表语或状
4、语以是主语,宾语,表语或状语,强调的主语,强调的主语如果是人,如果是人,that可以由可以由who换用。如果把这种换用。如果把这种句型结构划掉后,应该是一个完整无缺的句句型结构划掉后,应该是一个完整无缺的句子;这也是判断强调句型与其它从句的方法。子;这也是判断强调句型与其它从句的方法。第3页/共26页It+be+被强调部分被强调部分+that/who从句从句I met Tom in the park yesterday.1)It was I who met Tom in the park yesterday.2)It was Tom who I met in the park yesterda
5、y.3)It was in the park that I met Tom yesterday.4)It was yesterday that I met Tom in the park.It was five oclock _I got home.It was at five oclock_ I got home.whenthat第4页/共26页1)He didnt come because he was ill.It was because he was ill that he didnt come.2)She didnt go to bed until her father came b
6、ack.It was until her father came back that she didnt go to bed.(wrong)Not until her father came back did she go to bed.It was not until her father came back that she went to bed.第5页/共26页2.It is not until+被强调部分被强调部分+that.该句型也是强调句型。主要用于强凋时间状该句型也是强调句型。主要用于强凋时间状语,译成汉语直到才,可语,译成汉语直到才,可以说是以说是 not.until.的强调
7、形式。的强调形式。It was not until she took off her dark glasses that I realized she was a famous film star.=Not until she took off her dark glasses did I realize she was a famous film star.=I didnt realize she was a famous film star until she took off her dark glasses.第6页/共26页3.It is clear(obvious,true,poss
8、ible,certain.)that.该句型中该句型中it 是形式主语,真正的主语是是形式主语,真正的主语是that 引引导的主语从句,常译为清楚(显然,真的,导的主语从句,常译为清楚(显然,真的,肯定)是主语从句最常见的一种结肯定)是主语从句最常见的一种结构。构。It is very clear that hes round and tall like a tree.=That hes round and tall like a tree is very clear.第7页/共26页4.It is important(necessary,right,strange,natural.)that
9、.该句型和上一个同属一个句型;由于主句中的形容词该句型和上一个同属一个句型;由于主句中的形容词不同,不同,that 后的从句中要用虚拟语气(后的从句中要用虚拟语气(should+动词动词原形),原形),should 可以省去,建议记住该句型中的形容可以省去,建议记住该句型中的形容词。词。It is important that we(should)learn English well.It is necessary that he(should)remember these words.第8页/共26页5.It is said(reported,learned.)that.该句型中的该句型中的
10、it 仍是形式主语,真正主语是仍是形式主语,真正主语是that 引导的主语从句;该结构常译为据说(据报引导的主语从句;该结构常译为据说(据报道,据悉)。道,据悉)。It is said that he has come to Beijing.It is reported that another earth satellite has been put into orbit.第9页/共26页6.It is suggested(ordered/demanded/insisted/commanded.)that.该句型和上一个同属一个句型,主句中的过该句型和上一个同属一个句型,主句中的过去分词是表
11、示请求,建议,命令等词时,去分词是表示请求,建议,命令等词时,that后的从句要用虚拟语气(后的从句要用虚拟语气(should+动动词原形),词原形),should 可以省;常译为据建议;可以省;常译为据建议;有命令有命令)It is suggested that the meeting(should)be put off.It was ordered that we(should)arrive there in two hours.第10页/共26页7.It is a pity(a shame.)that.该句型中,该句型中,that后的从句一般用虚拟语气(后的从句一般用虚拟语气(shoul
12、d+动词原形),动词原形),should可省去表示出乎意料,可省去表示出乎意料,常译为竟然。没有这种意义时,则不用虚拟常译为竟然。没有这种意义时,则不用虚拟语气。语气。It is a pity that such a thing(should)happen in your class.这种事竟然发生在你们班上,真是遗憾!这种事竟然发生在你们班上,真是遗憾!It is a pity that he is ill.他生病了,真遗憾!他生病了,真遗憾!第11页/共26页8.It is time(about time,high time)that.该句型中该句型中that 后的从句应该用虚拟语气,值后
13、的从句应该用虚拟语气,值得注意的是得注意的是 常用过去时态表示虚拟常用过去时态表示虚拟 有时也用有时也用should+动词原形,动词原形,should 不能省,不能省,常译为是(正是)的时侯常译为是(正是)的时侯 It is time that children should go to bed.=It is time that children went to bed.第12页/共26页9.It is the first(second.)time that.该句型要和上一个句型区别开来,该句型中的该句型要和上一个句型区别开来,该句型中的 that 从句不用虚拟语气,而用完成时态。至于用从句不
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