高中英语unit3ahealthylifepartiiigrammarit的用法学案无答案新人教版选修6

Unit 3 A healthy life Part III Grammar It的用法一、【学习目标】1. 能根据例句，分析并总结it的用法。2. 把握it基本结构之后，会灵活运用。二、【基础知识】1、 it用作人称代词研读思考 (1) The frog is not a warmblooded animal. Its a coldblooded one.(2) -Who is it? -Its me. (3) They watched the train until it disappeared in the distance.(4) -Is this your dog? -No, it isnt.(5) This is our new car. I bought it yesterday. (6) They got a baby and it was a ten-pound baby.(7) Someone must have been here. But we have no idea who it was. (8) He smokes in bed and I dont like it. (9) Her mother kept telling her not to go out at night, but it didnt help. (10) I hate it when people talk with a full mouth.结构归纳 it用作人称代词，主要代替_，以避免重复; it也可指动物或性别不详的婴儿，如例句_。It还用于指人主要用确定未知人的身份，如例句_。It还可指代前句或后句所述的抽象事物或抽象环境和情景，如例句_。操练巩固 1. Someone is ringing the doorbell. Go and see _.有人在按门铃,去看看是谁。2. The doctor advised Vesa strongly that she should take a holiday, but _. （work）医生建议强烈Vesa应该度假，但医生的建议没有效果。二、it用作非人称代词研读思考 (1) It is a lovely day, isnt it? (2) It was nearly midnight when she came back.(3) It is April First today. (4) It is some 3000 kilometers from Beijing to Guangzhou.(5) -Whats the cost of the T-shirt? -It is 150 Yuan. (6) It is three dollars.(7) Today it is 30 degrees centigrade. (8) It is summer now.(9) It is about 5 kilograms. (10) It is noisy here.结构归纳 It用作非人称代词, 在以上10个例句中分别指代_、_、_、_、_、_、_、_、_、_、_。操练巩固 (1) We are determined to get our rights_ (不惜代价).(cost)(2)We must overcome every obstacle, _ (不管是什么困难 ) (whatever)(3)China is no longer _ (过去的样子了)（used to）3、 It做形式主语研读思考 (1) Its important for the figures to be updated regularlyIt is dishonest of him to say that he had a degree from Oxford.It is our duty to keep the classroom clean and tidy.(2) Its/There is no use complaining （抱怨是毫无用处的）, they never listen. (3) It is a shame that you cannot join us in this reunion(聚会) (4) It occurred to me（我突然想起）that he might have forgotten our date. (5) It is reported that another earth satellite has been put into orbit(轨道).(6) It turned out that（结果）she was a friend of my sister.(7) It will take her a long time to recover from the illness.(8) It remains to be seen whether or not he will be elected as mayor in two years time.结构归纳 It可以用作句子的形式主语，而把句子的真正主语移到后面去，句子的真正主语通常是：_，_，或_。常用的it作形式主语的句型如下: It + be + adj./ n. (for sb. / of sb.) + to do sth.句型中的形容词表示事物特点或特征时用for；表示人的性格特征或特点用 of. It is no use doing sth./ There is no use (in) doing sth. 做某事没有用 It is fun doing sth做很有趣 It is no good doing sth. 做某事不好 It is a pity (a shame /an honor /a good thing/a fact /a surprise/. ) that . me/him/her that +句子“我/他/她突然想到” that +句子 “据说，据报道，据信，据认为，据指出，据预料，据众所周知，据宣布” +句子 “结果” “做某事花了某人多长时间” +句子 “是否还要等着瞧”操练巩固 (1) _（你那样是不礼貌的）shout at the little girl. (it) (2) It is difficult for the little girl _(吃这么多饭).(eat)(3) _(他突然想到) that he had an important conference to attend the next morning.(occur)(4) _(将不一样) whether our pay will be raised by 5% this year.(difference)(5) (众所周知) that the earth turns around the sun.(6) _ (仍不得而知) he will be elected as mayor in two years time. (remain)(7) _（很可能）the thieves dont know how much it is worth.(likely)(8) As a graduate, he doesnt know _（需要什么）to start a business, （take）(9) _（是否要紧）whether we go together or separately?（matter）四、It做形式宾语研读思考 (1) We think it important to learn a foreign language.(2) We think it our duty to clean our classroom every day. (3) He felt it important learning English well. (4) They found it difficult that they would finish their work in two days.(5) The Internet makes it easier for companies to keep in touch with customers.(6) He made it clear that he was not interested in this subject.(7) You must_see to it that(确保) the door is locked. (8) I will/ would appreciate it (将不胜感激) if you can change your plan a little bit to make it more workable结构归纳 it作形式宾语，代替_，_或_。该句型中的it 作形式宾语，该结构中常用的动词有：think, believe, make ,find consider, feel。it作形式宾语的常用句型如下： 主+make/think/find/believe/ take/keep/feel + + / + for sb. +to do sth/that-clause see to it that “确保.”主语+make it clear that-句子 “某人明确表示。，某人公开阐明。”在动词 appreciate，dislike, hate, like, love等后，跟由 if 或when 引导的从句时，往往加上it,代替从句的内容。操练巩固 (1) More and more highways have been built, _ (使得更加容易) for people to travel from one place to another. （make）(2) I find _ (与那些人合作困难) those who always stick to their opinions. (it)(3) 1 (使之成为一种惯例）that I get up at six every day in the morning.(rule)(4) (说清楚了)he wouldnt come, Jack went out. (make)(5) I _ (讨厌当人们说话时)with their mouths full. (hate)五、it用于强调句型研读思考 (1) It was about 600 years ago that the first clock with a face and an hour hand was made. (2) It was they that (who ) cleaned the classroom yesterday.(3) It was in the street that I met her father. (4) It was yesterday that I met her in the street.(5) It is you that /who are wrong.(6) 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.结构归纳 强调句型: _,被强调部分往往为句子的主语、宾语、时间状语、地点状语等，但有时也可以强调比较复杂的内容。被强调的部分如果是人，that可以由_换用，被强调的部分如果是时间状语、地点状语等一律用that。在强调句型中去掉It is/was和that后句子仍然正确。操练巩固 (1) _ (是酒后开车)that resulted in the accident (it)(2) It was (他来晚了) this morning that made the boss so angry.（come）(3) I heard that it was ten years later, in 2010, _ (他们的婚姻破裂). (break) (4) It is those who are willing to give rather than receive _ to be respected.(deserve)(5) 1 It was not until the teacher explained it again （我们才理解）the sentence.（sense）(6) It was (限期临近) that he began to prepare the test papers. It is typical of him to do so. (approach)6、 it的其它句型研读思考 (1) It will be five years before we meet each other again.(2) This/It is the third time that I have seen the film.(3) It was the first time that she had been to the Great wall .(4) Come and see me when its convenient to/for you .(5) It is up to you(由你)to decide on the job.结构归纳 (1) . “还要多久才”(2) It is the first / second time that. has/have done sth（前is，后 时） It was the first / second time that. had done sth （前was，后 时）(3) “当你或我方便的时候.”(4) “由你决定”.操练巩固 (1) Measures have been take