Grammar,The use of “it”,It is never too old to learn.,It,How much do you know about “it”?,The Use of “it”,代词 it,引导词 it,It句型归纳 Sentences With “it”,1. 做人称代词，代替前文提到过的事物。,代词 it,You body becomes accustomed to having nicotine in it.,2. 用以代替指示代词this, that。,- Whose text-book is that? - Its hers.,- Whats this?,- Its a flag.,As you know, if you do the same thing over and over again, you begin to do it automatically.,3. 用以代替未知的人或婴儿。,Someone is knocking at the door. Go and see who it is.,your body,the thing,4. 做非人称代词，指代时间、天气、距离、环境、季节、日期、价值等。,Its time for class.,It is summer now and it gets hotter and hotter.,Its about two kilometers from here to my home.,It is very quiet in our classroom every night.,代词 it,-Whats the date today? -Its May 15, 2013.,-Whats the cost of the T-shirt? -It is 150 yuan.,时间,天气,距离,环境,季节,日期,价值,It was a sunny day. Peter decided to go for a walk to the park even though it was 2 miles away. He was just about to leave the house when someone knocked at the door. “Who is it?”,he thought. When he opened the door, he found nobody but a note on the ground. He picked it up and read. It is surprising that the note should have been given to his neighbour.,the use of it,Discover,天气,距离,未知的人,形式主语,note,2、It is no good smoking.,3、It is am amazing that at my age I am still fit.,真正主语,真正主语,形式主语,形式主语,真正主语,形式主语,= To walk on the street was so comfortable.,= Smoking is no good.,= That at my age I am still fit is amazing.,1、It was so comfortable to walk on the street.,引导词 it,Summary： it作形式主语，代替由不定式（或不定式复合结构）、动名词或从句表示的真正主语。,Discover the use of it,此处adj. 通常为描述人的形容词：kind; rude; silly， careful; careless; foolish; stupid; clever; wise. Its kind of you to help me with the problem.,（1）It is+ adj.+（for sb.）to do sth.,此处adj. 通常为描述事件的形容词：easy; hard; difficult; necessary; likely; impossible; important; useful; dangerous It is important for a teenager to learn English well,（2）It is + adj. + （of sb.） to do sth.,代替不定式,= to learn English well is important to for a teenager,= You are kind to help me with the problem.,Structures,e.g. It is fun to go out for a walk.,（3）It is + 名词 + to do sth.,常用的名词有：fun; pity, shame, pleasure.,不可数名词,It is a shame to be late for class,It is a pleasure to have the chance to help you.,(5) Its no good/use doing,e.g. Its no use crying over spilt milk.,(4) It takes Sb. some time to do.,e.g. It took me 3 days to prepare this lesson.,代替doing,常见的adj.有:possible;clear;obvious;true,etc It is very clear that he grows like a tree.,(1) It is + adj. + that 从句,(3) It is + v-ed + that 从句,It is said (reported/believed/ thought/known/ told/ suggested.) that . 译为“据说（据报道，据悉）”。 It is said that he has gone to Beijing. It is reported that Chairman Xi will visit Hangzhou.,(4) It happens/ seems/appears+ that 从句,It seems that there is no way out of our difficulty.,代替主语从句,(2) It is + n. + that 从句,常见的n.有:a shame; a pity, a fact,etc It is a pity that you missed the football match.,作形式宾语，代替由不定式、动名词或从句表示的真正宾语。,He feels it his duty to help others.,We thought it no use doing that.,引导词 - it,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。,注意：常用的动词有think, believe, make, find, consider, feel等。,注意：,在动词appreciate, dislike,hate，like, love等后面代替if或when等引导的从句。,I would appreciate it if you can come.,it 代替if引导的宾语从句。,Giving up smoking is difficult. It is 2. Some young people think they look attractive when they smoke. It seems 3. Most people believe smoking causes cancer. It is believed 4.Dont try to quit on a stressful day. It is no use,that smoking causes cancer,that some young people think they look attractive when they smoke.,difficult to give up smoking.,Practice,trying to quit on a stressful day.,1、用it句型改写句子，意思不变。,5. China produces one third of the worlds cigarettes. It is astonishing 6. You are not allowed to advertise cigarettes in this country. It is illegal 7. My father has quit smoking at last. It is wonderful 8. The night was dark and stormy when the old man started his journey. It was a 9.You could suffer from bad health if you keep smoking. It is likely 10.You have to take pills to control your blood pressure. It is necessary,that China produces one third of the worlds cigarettes.,to advertise cigarettes in this country.,that my father has quit smoking at last.,dark and stormy night when the old man .,that you could suffer from bad health if .,for you to take pills to control your .,2、用it句型把A句转换为B句，意思不变。 1. A.To keep order in an important football match is a hard job for the police. B_ _ _ _ _ for the police to keep order in an important football match. 2A.To recite the passages in New Concept English is an effective way in English study. B. _ _ _ _ _ in English study to recite the passages in New Concept English.,It is a hard job,It is an effective way,3. A.I meant that you might go without me, but I didnt make that clear. B.I didnt _ _ _ that you might go without me. 4A. Memorizing 20 English words a day is ea