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1、Grammar,it的用法I. 人称代词II.形式主语；形式宾语III.用于强调句型中,it作人称代词,1.The frog is not a warm-blooded animal. Its a cold-blooded one.,1. 用于指刚提到的事物，以避免重复。,2 My pen is missing. I cant find _.,3 The adolescent is gaining weight, and _ worries his parents.4.-Sorry, sir. There is only one blue tie available. Take _?-No,
2、thanks. I prefer a black _.,it,it,which,it,one,2. 用于指代人,2)指代说话者不太清楚的那个人，常用在打电话和敲门时。 e.g. Who is knocking at the door？ _is me.,1) 性别不明时,Look at the poor baby. _is crying again.,It,It,3. 代替指示代词that, this, Whose pill is this？ _is mine.,Whos that over there? _Helen.,It,Its,4.用来表示时间、天气、距离、自然环境，地点、温度；抽象的环
3、境.,1)Its half past five now. 2) Its getting freezing cold. 3) Its 10 minutes drive to the post office? 4) It was very quiet at the moment. 5) How is it getting along?,(time),(weather),(distance),(environment),(situation),it作形式主语、形式宾语,1. 做形式主语 不定式 It +be+adj.+ for (of) sb.+ to do； It is important for
4、 you to learn English well. Its generous of you to donate such a large amount of money to charity.,It + be+名词+to do e.g. It is a good idea to quit smoking before one becomes pregnant. 没有见到那位学者本人真可惜！ It is a pity/ shame not to see that scholar in the flesh.,be+介词短语； It is against the law to sell ciga
5、rettes to adolescents in Britain. 其他类型的谓语 It gives me great pleasure to see a movie. It takes careful preparations to pass a job interview.,2) 动名词 It be+ no good/ no use/useless/ worth/ fun/a waste of +doing It is much fun working for Google.,In the opinion of many teachers, it is a waste of time pl
6、aying computer games. It is no use crying over spilt milk.,3) 主语从句 a It +be +adj.+that It is certain that everything will work out successfully due to our hard work. It is strange that he should not feel ashamed of his behavior. It is strange/surprising/important/necessary, +that + S + should +do,b
7、It +is +n.+that e.g. It is a pity/shame that he should get into the habit of abusing alcohol. _ that you are breathless; you have been walking for hours.,It is no wonder,c It +is +said/ reported/ believed/ known to sb that e.g. It is said that the book has been translated into several languages. It
8、+is+suggested/ordered/required/ insisted that S+(should)+do It is suggested that the students (should) build up their strength.,也可能是wh-词引导的 It is still a question how many people are to come to the meeting. It is none of your business where I will spend this summer holiday.,It remains to be seen whe
9、ther it will do the environment harm or good. 对环境有好处还是有害处, 还要等着瞧。 It (so) happens that . It seems/ appears that It happened that my grandad went out when the fire broke out.,1) 当复合宾语中的宾语是不定式、动名词、宾语从句时,用it 作形式宾语, 将真正的宾语放在宾语补足语之后 S+make/ think/ believe/find/consider/feel +it+adj./n.+to do /doing/that.
10、,He considers it his duty to help those at risk. I think it no use arguing with him.,作形式宾语。,The school has made it clear over and over again that smoking is banned in the school.,2) like/ love/ enjoy/ prefer/ dislike/ hate/ appreciate +it+ that/ when/ if从句 I dont like _ when one speaks with his mout
11、h full. 要是准许我加入校足球队，我将不胜感激。 (admit) I would appreciate it if I were admitted to the school football team.,it,I hate _you speak when your mouth is full. 3) depend on it that rely on it that see to it that (make sure that) take it for granted that Dont take it for granted that famous brands mean high
12、quality.,it that,1.You can _(相信）he will come here on time. 2.Can you _(保证）the door is locked when you leave? 3._(我将不胜感激）if you could share your umbrella with me. 4.Dont _ all those who get good grades in the examination will prove too be the most successful.,depend on it that,see to it that,I would
13、appreciate it,take it for granted that,It用于强调句型中,1) “It is/was+被强调部分+that+句子的其他部分”。如果强调的是人,可以用who, whom代替that。 Tom risked losing his life to save a drowning child last year. It was Tom that risked losing his life to save a drowning child last year,who,It is I _ singing in the garden.,that am,Was it
14、Tom that risked losing his life to save a drowning child last year 2) Is /was it +被强调部分+that Who was it that risked losing his life to save a drowning child last year. 3) 疑问词+is/was +it+ that 注意：Can you tell me _ risked losing his life to save a drowning child last year?,who it was that,His health d
15、idnt improve until he quitted smoking.,It was not until he quitted smoking that his health improved .,Not until he quitted smoking did his health improve.,4)It was not until that ,1. 我是在街上遇见她的父亲的。(强调在街上) 2. 你是8点开始工作的吗？（强调时间） 3. 他为什么不能回答这个问题？ 4.我把手提包落在了我们先前吃晚饭的餐馆里了,It was in the street that I met her father.,Was it at eight oclock that you began to work?,It was in the restaurant where we had had supper that I left my handbag.,Why was it that he couldnt answer the question？,It用于固定的句型或短语中,It is time that you _a judgement about it. 1)It is (high/about) time that+ 主语+did/should +do It is th
