高考专题复习it用法课件.pptx

高考专题复习 it 用法总结1、it一般指无生命的物或动物一般指无生命的物或动物I have bought a chair.It is made of pine wood.我买了一把椅子。它是松木做的。I am taking the meat back to the shop because it isnt good.我要把肉退回店里，因为它不好了。但可以指代婴儿，或不清楚对方性别但可以指代婴儿，或不清楚对方性别The baby is crying.It must be hungry.婴儿在哭。它一定饿了。I did not disturb the child because it was sleeping.我没有打扰那孩子，因为他正在睡觉。2、it指某件事指某件事（it指代的是什么，从上下文来判断）Take it easy.不要紧张。Id rather not talk about it.我不想多谈此事。It is your affair,not mine.这是你的事，不是我的事。3、做主语，指代时间、日期、距离、天、做主语，指代时间、日期、距离、天气等气等it做非人称代词做非人称代词It is snowing on the mountains.山上正在下雪。What time is it?Its two-thirty.几点了？现在是两点半。Its been almost a week and she hasnt been coughing today.快到一个星期了，她今天没咳嗽。It was nearly dark and she was a good fifty miles from home.天快黑了，她离家还有50英里远。Its only five-mile ride from here.离这里只有五英里的路程。4、形式主语、形式主语真正主语可能是动词不定式，动名词或主语从句，真正主语可能是动词不定式，动名词或主语从句，一般后置。一般后置。It is dangerous to play with fire.玩火是危险的。In all things,it is better to hope than to despair.凡事抱希望为佳，不应悲观而失望。4、形式主语、形式主语It is a great art to laugh at your own misfortune.对己之不幸付之一笑，这是一门伟大的艺术。It is no use crying over spilt milk.覆水难收。Its no use arguing with a drunk.和酒鬼理论是没用的。1.that从句。基本模式为：it系动词表语that从句。主要四种句型：1）.itbe形容词that从句。句型的形容词有：necessary clear，true，strange，important，wonderfulpossible，likely，obvious，surprising等。（2）.Itbe名词（词组）that从句。常用于这种句型的名词（词组）有：fact，good idea，honour，shame，no wonder，good news等。（3）.ltbe过去分词that从句。常用于这种句型的过去分词有：said，reported，hoped，believed expected等。（4）.It+seems/happens/appears/doesnt matter/makes no differencethat从句。备注：要体会that从句用陈述语气，还是虚拟语气。2.what从句，what引导主语从句做形式主语。如：It doesnt matter what he says.3.who从句，如：It is not clear who will attend to this matter.4.how从句，如：It hit her how exciting the news was.5.when从句，如：It hasnt been made clear when the conference is to take place.6.where从句，如：It doesnt matter too much to me where you go.7.why从句，It was not clear why Tom was late for the meeting.8.whether从句，如：It doesnt interest me whether you succeed or not.it作不定式的形式主语作不定式的形式主语基本模式为：基本模式为：it+be+表语表语 +不定式，或不定式，或it+谓谓语动词语动词+宾语宾语 +不定式。常见句型有不定式。常见句型有1).it+be+形容词+不定式。如：It is difficult to learn English.2)it+be+名词+不定式。如：It was his job to clean the yard.3)it+动词+宾语+不定式。如：It took me a lot of time to finish the task.4)it+be+介词短语+不定式。It is against the law to steal.it作动名词的形式主语作动名词的形式主语1)it+be+名词（如：no good,no use,nuisance,a waste,a wonder 等）+动名词。如：Its no use spending a lot of time on the job.2)it+be+形容词+动名词。It was very hardt getting along well with those men.5、形式宾语、形式宾语真正宾语可能是动词不定式，动名词或宾语从句，真正宾语可能是动词不定式，动名词或宾语从句，一般后置。一般后置。I find it impossible to get on with Li Tao.我发现和李涛相处不下去。I find it interesting that she claims not to know him.我觉得有趣的是她声称不认识他。5、形式宾语、形式宾语It做形式宾语：当做形式宾语：当it做形式宾语时，常替代动词不做形式宾语时，常替代动词不定式短语或宾语从句，其结构为：主语定式短语或宾语从句，其结构为：主语+谓语动谓语动词词+it+adj/n+to do sth/that，It偶尔也替偶尔也替代动名词。常用于此结构的及物动词有代动名词。常用于此结构的及物动词有believe/feel/find/make/consider/think/suppose/regard等。等。在英语中，某些动词或动词短语不能直接跟宾语从句，必须先接上形式宾语it，然后再把真正的宾语放在后面。这类的动词多表示“喜好”、“厌恶”、“认为”等抽象意义。如like/dislike/enjoy/love/hate/appreciate/owe“欠、归功于”等等，其结构为：V+it when/if从句。动词短语depend on/answer for“负责、担保”/insist on/see to“确保”/takefor granted“认为理所应当”等后接that从句时，须用It做形式宾语。例如：I see to it that she goes to school on time.我负责确保她准时到校。5、形式宾语、形式宾语I thought it best to call first.我想最好先打个电话。I thought it best(that)I leave them with a neighbour.我想最好把它们交给邻居。I took it for granted that we should build new roads.我认为我们应该修新路是理所当然的。6、用在强调句、用在强调句its who/that中中强调主语，宾语或状语强调主语，宾语或状语（被强调的是人，用（被强调的是人，用who/that；其他用其他用that）It was John who broke the window.是约翰打破了窗户。It was his parents that he turned to for advice.他向父母寻求建议。6 、用在强调句、用在强调句its who/that中中It was the first money that he had ever had.这是他有生以来的第一笔钱。It was when he was in Paris that he became a well-known writer.他是在巴黎时成为一位著名作家的。