高中英语课件-it的用法.ppt

Good morning, everyone!, It is never too old to learn. It is easier to fall than to rise. It is no use crying over spilt (溢出的) milk. It never rains but it pours(泼水).,Proverbs(谚语) with “It”,活到老, 学到老。,摔倒容易爬起来难。,覆水难收。,不鸣则已, 一鸣惊人。, It is easy to open a shop but hard to keep it always open. It takes three generations (代,辈) to make a gentleman.,创业容易守业难。,十年树木，百年树人。,Grammar: Use of “It”,2019/5/6,课文原句再现,1.Its a beautiful day here and I am sitting under the big tree at the end of the garden. 2.Your mother tells me that you started smoking some time ago and now you are finding it difficult to give it up. 3.Believe me, I know how easy it is to begin smoking and how tough it is to stop.,The use of “it”,1.用作人称代词，代表前面提到的人或事物。,Whos it? _me. Look at the picture. _is a picture of our school.,Its,It,2.用于代替指示代词this 和that。,-Is this jacket yours? -Yes, _is.,it,Read and analyze the following sentences.,It is Friday today. It was very cold last Monday. It is about 8:30 now. It is about 25km from Longxian to Bazi. It lies in the south of Shaoguan city. It is 40C ! You got a high fever! Conclusion :it 可以用作非人称代词，表示_,_,_,_,_,_等。,Date,weather,time,distance,place,Temperature,日期,天气,时间,距离,地点,温度,e.g: _ a. Jim is at the door_wants to see you b. Someone is at the door_must be Jim A. That, It B. It, He C. He, It D. Who, He 一般说来，在指代身份或性别明确的人时，通常要根据情况用代词heshe；若是指代身份或性别不明的人，则用代词it,Back,C,1. I cant find my pen. Im going to buy _. 2. Life today is better than _ in the old days. 3. I cant find my pen. I must have lost _.,_用来指代前面提到的可数名词，所指的是事物本身； _则用来替代前面出现过的可数名词，泛指，指一类事物中的一个 . _用来代替不可数名词或单数可数名词，特指。,one,that,it,it,one,that,It 作为形式主语 当不定式、动名词、从句等用作句子主语时，为保持句子平衡，通常把真正的主语放在句末，而在句首使用形式主语it.,2019/5/6,eg: It is illegal（for a teenager）to drive a car without a license. It is necessary for you to give him a letter. Conclusion： 在句1和句2中 it 的作用是_ ,真正主语是_。,形式主语,不定式短语,（1）It +be +adj.+（for sb.）to do sth. 此处adj. 通常为描述事件的形容词：easy，difficult，hard，necessary，impossible，likely，right，wrong，important，obvious，useful，useless，dangerous,2019/5/6,（2）It +be+ adj+ of sb. to do sth 此处adj. 通常为描述人的形容词：kind，unkind，nice，rude，cruel，considerate，careless，foolish，stupid，wise，crazy. eg: 1. Its kind of you to help me with the problem. 某人做某事某人是.,2 Its foolish of you to quit your job now.,2019/5/6,3.It is no good crying over spilt milk. 4.It is no use casting pearls before swine . 在句3与句4中，it的作用是_, 真正主语是_.,形式主语,动名词短语,构成如下结构： It is +no use/no good/not any good/not any use+ doing sth.,Read and analyze the following sentences.,It is obvious that the water was to blame. Is it possible that he will become the chairman of our country? It is amazing that at my age I still look like a student! Analysis：it是_ ,句子真正的主语是_,形式主语,that引导的主语从句,Conclusion：It is+ _+ that从句,adj.,跟踪训练1：It is+ adj. + that从句,很明显他已经知道了那个坏消息。 姚明篮球比易建联打得好是肯定的。,It is obvious that he has known the bad news.,It is certain that Yaoming plays basketball better than Yijianlian.,It is said that 据说 It is reported that It is supposed that It is hoped that It is well known that,据报导,据推测,希望,众所周知,普遍认为,有人建议,It is said (reported) that .,It is suggested that,It is generally considered that,该句型中的it 仍是形式主语，真正主语是 that引导的主语从句。,1.吸烟危害健康，这是事实。 2.碰巧我们在同一间大学 。 3.据说日本发生了地震。 4.有人建议他应该立刻戒烟。,It is a fact that smoking does harm to health.,It happens that we are in the same college.,_ there is an earthquake in Japan.,It is said that,_ he should quit smoking at once.,It is suggested that,二、it作形式宾语,1. I found it very interesting to study English. 我发现学英语非常有趣。 2. I think it no use arguing with him. 我认为和他争吵没有用。 3. He made it clear that he was not interested in this subject. 他非常清楚地表示他对那门学科不感兴趣。,小结： it在句中充当_，真正宾语可以由_ 以及_短语充当。 还可以由_引导的宾语从句充当。,不定式,动名词,that,形式宾语,总结：当复合宾语中的宾语是不定式、动名词宾语从句时, 往往把真正的宾语放在它的补足语后面，而用it 作形式宾语, 放在宾语补足语之前。 该句型中的it 作形式宾语, 常用的动词有think, believe, make, find, consider, feel等。,在一些固定用法中考查,常见的固定用法有: make it forget it believe it or not Dont mention it It doesnt matter It(That) depends Got it Its hard to say Its up to you to do sth. take it/things easy,成功，做到，赶上等 别提了，忘了它吧 信不信由你 别提了，表示不用谢 没关系 视情况而定 明白了，懂了 很难说 由你来决定做某事 不要慌，别担心，沉住气,Rewrite the sentences using an “it” structure.,1 Giving up smoking is difficult. (It is) 2 Most people believe smoking causes cancer. (It is believe that) 3 Dont try to quit on a stressful day. (Its no use) 4 you could suffer from bad health if you keep smoking. (It is likely that),It is difficult to give up smoking.,It is believed that smoking causes cancer.,It is no use trying to quit on s a stressful day.,It is likely that you could suffer from bad health if you keep smoking.,One midnight, was raining heavily.Mary was lying in bed.She couldnt fall sleep. Suddenly, she heard someone knocking at the door.“Who is ?” She asked.She looked at the clock hung on the wall. was striking two. “ is me.”One man answered. “ was impossible for him to appear here.”she thought. “John?Is_ you?” “Yeah! is me”the man answered. She rushed to open the door.John was just standing in front of her.He said to Mary excitedly, “I missed the plane. was said that the plane I would take crashed down three hours ago. It was in that plane I should have gone to New York. After this, I think clearly that I love you so much I want to be marry you.”,it,it,It,It,It,It,It,it,that,that/which,that,that,Fill in the blanks,Translation,1. 是到戒烟的时候了。(quit) It is time to quit smoking.,2. 让人惊讶的是在我这个年纪我依然 这么健康。(It is amazing that.) It is amazing that at my age I am still so fit.,It seems strange that the man who had delevoped communism should have lived and died in London.,3. 一旦你吸烟上了瘾, 你会发现要把它戒掉 很难。(addict. to; tough) Once you are addicted to smoking,