
it用法及引导的重点句型课堂PPT.ppt
26页06届高三第二轮复习1㈠㈠ 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, isn’t 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 isn’t.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 that..2.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、环境等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,称为非人称的it::2.1.指天气:指天气:It is a lovely day, isn’t it?It is a bit windy. 22.2.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 café.2.4.指距离:指距离:It is half an hour’s 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 is it? ---It’s 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 doesn’t matter.It is a shame, isn’t it?3㈡㈡.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 4强调句型强调句型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 yesterday.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 o’clock _________I got home.It was at five o’clock_______ I got home. whenthat51)He didn’t come because he was ill.It was because he was ill that he didn’t come.2) She didn’t go to bed until her father came back.It was until her father came back that she didn’t 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.62. 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 didn’t realize she was a famous film star until she took off her dark glasses. 73. It is clear ( obvious,, true,, possible,, 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 he’s round and tall like a tree. = That he’s round and tall like a tree is very clear. 84. It is important ( necessary,, right,, strange,, natural...) that ... 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 It is important that we (should) learn English well. It is necessary that he (should) remember these words. 95. It is said (reported,, learned....) that ... 该句型中的该句型中的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. 106. 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. 117. 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((should + 动词原形),动词原形),should可省去.表示出可省去.表示出乎意料,常译为"竟然"。
没有这种意义时,则乎意料,常译为"竟然"没有这种意义时,则不用虚拟语气不用虚拟语气 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! 128. 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,值后的从句应该用虚拟语气,值得注意的是得注意的是①① 常用过去时态表示虚拟.常用过去时态表示虚拟.②② 有时也用有时也用should + 动词原形,动词原形,should 不能不能省,常译为"是(正是)...的时侯..省,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. 139. 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。
至于用从句不用虚拟语气,而用完成时态至于用什么完成时态,由主句的谓语动词的时态决定什么完成时态,由主句的谓语动词的时态决定如果是一般现在时,后面从句用现在完成时态;如果是一般现在时,后面从句用现在完成时态;如果是一般过去时,后面从句则用过去完成时态,如果是一般过去时,后面从句则用过去完成时态,该结构中该结构中 that 可以省去;可以省去;it有时用有时用 this 替换.常替换.常译为"是第一(二)译为"是第一(二)……次次……" It is the first time I have been here. = This is the first time I have been here. 1410. It is .... since ... 该句型主要用作处理瞬间动词的完成时,又该句型主要用作处理瞬间动词的完成时,又要和表示一段时间的时间状语连用的问题,要和表示一段时间的时间状语连用的问题,主句中是时间作表语,其时态是现在时或完主句中是时间作表语,其时态是现在时或完成时,成时,since 引导的从句通常是一般过去时态引导的从句通常是一般过去时态,而且是瞬间动词如果主句是一般过去时,,而且是瞬间动词。
如果主句是一般过去时,从句则用过去完成时从句则用过去完成时 It is ( has been ) 5 years since his father died. It is three years since I came to live here.1511. It be ... when ... 该句型中的该句型中的 when 引导的是一个时间状语从句,主句引导的是一个时间状语从句,主句中的中的 it 指时间,表语由具体的时间充当,常译为"当指时间,表语由具体的时间充当,常译为"当...的时候,是..."...的时候,是..." It was 5 o’clock when he came here. 12. It be ... before ... 该句型主句中的该句型主句中的 it 指时间,指时间, 主句中的时态常是将来一主句中的时态常是将来一般时或过去时两种时态.主句中的表语多是般时或过去时两种时态.主句中的表语多是long,, not long ,, 3 days ,, 2 weeks 等表示时间段的词或等表示时间段的词或短语,常译为"...之后..."短语,常译为"...之后..."。
It was 3 days before he went to Beijing. It will be not long before he finishes his job. 1613. It happens (seems,, looks,, appears ) that... 该句型中该句型中it是形式主语,是形式主语,that 引导的是主语从句,引导的是主语从句,主句中的主句中的happen ,, seem等词是不及物动词等词是不及物动词 It happened ( so happened ) that he met his teacher in the street. 碰巧..碰巧... It seems that he will be back in a few days. .... 14. It takes sb. ... to do sth. 该句型中的不定式是真正的主语,该句型中的不定式是真正的主语,it是形式主语,句是形式主语,句型中的直接宾语是时间,常译为"做型中的直接宾语是时间,常译为"做……要花费某要花费某人人……" It took thousands of people many years to build the Great Wall. 1715. It is no good (use ) doing sth. 该句型中的真正主语是动名词短语,主句中的表语可该句型中的真正主语是动名词短语,主句中的表语可以是以是no good ,, ( not any good ) ,, no use ,, ( not any use )。
It is no good learning English without speaking English. 16. It doesn’t matter whether ( if ) ... 该句型中该句型中whether(if) 引导的从句是真正主语,该句引导的从句是真正主语,该句型常译为 "不论(是否)...没关系... 型常译为 "不论(是否)...没关系... It doesn’t matter if they are old. 1817. It is kind ( of sb. ) to do sth. 该句型中的不定式短语是真正主语,如果不定该句型中的不定式短语是真正主语,如果不定式的逻辑主语是由式的逻辑主语是由 of引起,主句中的形容词必引起,主句中的形容词必须是能表示逻辑主语特征的形容词须是能表示逻辑主语特征的形容词 常见的有:常见的有: bad ,, brave ,, careless,, clever ,, cruel ,, foolish ,, good (好心的)(好心的),, honest ,, horrible ,, kind ,, lazy ,, modest ,, naughty ,, nice(有教养的),(有教养的), polite,, rude ,, silly ,, stupid ,, wise ,, wrong(错误的)等。
错误的)等 这个句型可以改写为:这个句型可以改写为:sb. is kind to do sth. It is kind of you to say so. = You are kind to say so. 1918. It is necessary ( for sb. ) to do sth. 该句型与上一个同属一个句型,如果不定式的逻该句型与上一个同属一个句型,如果不定式的逻辑主语是由辑主语是由for引起,主句中的形容词通常是表示引起,主句中的形容词通常是表示重要性,紧迫性,频繁程度,难易,安全等情况重要性,紧迫性,频繁程度,难易,安全等情况的形容词的形容词 常见的形容词有:常见的形容词有:①① important,, necessary,, natural ②② easy ,, safe ,, common ,, normal ,, hard ,, difficult ,, dangerous ,, unusual,, rare ,, impossible ,, pleasant等 =在在①①中的形容词作表语可以用从句改写,中的形容词作表语可以用从句改写, 如:如: It is important for her to come to the party. = It is important that she (should ) come to the party. 2019. It looks ( seems ) as if ... 该句型中该句型中it无意义,无意义, as if 引导一个状语从句。
常译为,引导一个状语从句常译为,"看起来好象..."如果与事实不相符合,则用虚"看起来好象..."如果与事实不相符合,则用虚拟语气 It looks as if he is ill.(真的病了) (真的病了) It looks as if he were ill. (没有生病)(没有生病) It seemed as if he were dying. 2120. We think it important to learn a foreign language. 该句型中的该句型中的it 作形式宾语,为了记忆方便我们可称该句作形式宾语,为了记忆方便我们可称该句型为型为"6123结构结构" 6指主句中常用的动词:指主句中常用的动词:think,believe,make,find,consider,feel;; 1指的是形式宾语指的是形式宾语it;; 2指的是宾补的两种形式:形容词或名词;指的是宾补的两种形式:形容词或名词; 3指的是真正宾语的三种形式:不定式短语,动名词短指的是真正宾语的三种形式:不定式短语,动名词短语或语或that引导的宾语从句引导的宾语从句 We think it our duty to clean our classroom every day. He felt it important learning English well. They found it difficult that they would finish their work in two days.22l((1)冬天,天色晚得早。
冬天,天色晚得早l((2)问她没有用问她没有用l((3)从这儿到车站有两英里(路程)从这儿到车站有两英里(路程)lIt is getting dark earlier in winter.lIt is no use asking her.lIt’s two miles from here to the bus station.23lIt is said that he has been to the U.S.A. twice.lIt seems that he is much afraid.lIt was several months before we met again.l(4) 据说他已去过美国两次了据说他已去过美国两次了l(5) 看来,他很害怕看来,他很害怕l(6) 几个月之后我们才又见面几个月之后我们才又见面24•It is up to you decide what to do.•It is said that he has been to the U.S.A. twice.•It’s a pity that you’ve missed the chance.•It’s a waste of time to do it.•It’s no use crying over spilt milk.•It won’t be long before we graduate from middle school.•It’s two years since I joined the League.Sentences for recitation:2526。












