it用法公开课ppt

1、 The use of “it”How much do you know about “it”?The Use of “it”代词代词 it引导词引导词 itIt句型归纳句型归纳 Sentences With “it” 1. 做人称代词，代替前文提到过的事物。做人称代词，代替前文提到过的事物。代词代词 itYou body becomes accustomed to having nicotine in it. 2. 用以代替指示代词用以代替指示代词this, that。- Whose text-book is that? - Its hers.- Whats this?- Its a fla

2、g. 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。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. 做做非人称代词，非人称代词，指代指代时间、天气、距离、时间、天气、距离、环境、季节、日期、价值等。环境、季节、日期、价值等。Its time for class. It is summer now

3、 and it gets hotter and hotter.Its about two kilometers from here to my home.It is very quiet in our classroom every night. 代词代词 it -Whats the date today? -Its May 15, 2013.-Whats the cost of the T-shirt?-It is 150 yuan.时间时间天气天气距离距离环境环境季节季节日期日期价值价值 It was a sunny day. Peter decided to go for a walk

4、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 neigh

5、bour. the use of it天气天气距离距离未知的人未知的人形式主语形式主语note2、It is no good smoking.3、It is am amazing that at my age I am still fit.真正主语真正主语真正主语真正主语形式主语形式主语形式主语形式主语真正主语真正主语形式主语形式主语= 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 t

6、o walk on the street.引导词引导词 it Summary： it作作形式主语形式主语，代替由不定式（或不，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。定式复合结构）、动名词或从句表示的真正主语。 此处此处adj. 通常为通常为描述人描述人的形容词：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. 此处此处

7、adj. 通常为通常为描述事件描述事件的形容词：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.= to learn English well is important to for a teenager= You are kind to help me with the problem.e

8、.g. It is fun to go out for a walk. （3）It is + 名词名词 + to do sth.常用的名词有：常用的名词有：fun; pity, shame, pleasure.不可数名词不可数名词It is a shame to be late for classIt is a pleasure to have the chance to help you.(5) Its no good/use doinge.g. Its no use crying over spilt milk.(4) It takes Sb. some time to do. e.g.

9、It took me 3 days to prepare this lesson. 常见的常见的adj.有有:possible;clear;obvious;true,etc It is very clear that he grows like a tree. (1) It is + adj. + that 从句从句(3) It is + v-ed + that 从句从句 It is said (reported/believed/ thought/known/ told/ suggested.) that . 译为译为“据说（据报道，据据说（据报道，据悉悉）”。 It is said tha

10、t he has gone to Beijing. It is reported that Chairman Xi will visit Hangzhou. (4) It happens/ seems/appears+ that 从句从句It seems that there is no way out of our difficulty.(2) It is + n. + that 从句从句 常见的常见的n.有有:a shame; a pity, a fact,etc It is a pity that you missed the football match. 作作形式宾语形式宾语，代替由

11、不定式、动名词或从，代替由不定式、动名词或从句表示的真正宾语。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。他非常清楚地表示他对那门学科不感兴趣。注意注意：常用的动词有：常用的动词有think, believe, make, find, consider, feel等。等。 在动词在动词appreciate

12、, dislike,hate，like, love等等后面代替后面代替if或或when等引导的从句。等引导的从句。I would appreciate it if you can come.it 代替代替if引导的宾语引导的宾语从句。从句。1.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 believed4.Dont

13、 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.trying to quit on a stressful day. 1、用、用it句型改写句子，意思不变。句型改写句子，意思不变。5. China produces one third of the worlds cigarettes. It is astoni

14、shing 6. You are not allowed to advertise cigarettes in this country. It is illegal 7. My father has quit smoking at last. It is wonderful8. 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 t

15、o 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

16、to control your . 2、用、用it句型把句型把A句转换为句转换为B句，意思不变。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. _ _

17、_ _ _ in English study to recite the passages in New Concept English.It is a hard jobIt 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 easy for me. B.I find _ _ _ _20 E

18、nglish words a day.make it clearit easy to memorize5A.Who will take us to visit the nature park hasnt been decided yet. B._ _ _ _ _ who will take us to visit the nature park.6A.He gets up early and runs around the playground for half an hour every day.He has made that a rule. B.He has made _ _ _ _ _

19、 _ _ and run around the playground for half an hour every day.It hasnt been decided yet it a rule to get up early 7A.A fire is reported to have taken place in the experimental building this morning. B._ _ _ _ a fire took place in the experimental building this morning.8A.I spent two hours writing th

20、e essay. B._ _ _ _ _ to write the essay. It is reported that It took me two hours Everyone consider it important to have enough sleep. The amount of sleep needed varies from person to person and it depends on the age of the person and the conditions in which sleep takes place. The young may need mor

21、e sleep than the old, but it is said that eight hours are enough for the health of grownups. Some can do with less than this amount, but others may need more. Every person knows his own need. It is then a matter of good judgment to satisfy his need. Sleep is essential for our health. It is enough sl

22、eep that can make one bring back his strength and get ready for a days work.is said thatto have enough sleepisthat强调结构 to satisfy his need 3、辨别、辨别it的用法。的用法。Happy New Year! the greeting will be said and heard as a new year arrives. It is at this time of the year that families and friends get together

23、 to say goodbye to the old and welcome the new. It was the oldest of all holidays. Traditionally, it was thought that one could affect the luck they would have throughout the coming year by what they did or ate on the first day of the year. For that reason, it has become common for people to celebra

24、te the first few minutes of a new year in the company of family and friends. It is a popular belief that anything in the shape of a ring is good luck, because it symbolizes coming full circle, completing a years cycle.It is at the time of the year thatit was thought thatnew year强调结强调结构构 It is never

25、too old to learn. 活到老，学到老。活到老，学到老。 It is easier to fall than to rise. 摔倒容易爬起来难。摔倒容易爬起来难。 It is no use crying over spilt（溢出的）（溢出的）milk. 覆水难收。覆水难收。Proverbs with “It” It never rains but it pours(泼水泼水). 不鸣则已，一鸣惊人不鸣则已，一鸣惊人。 It takes three generations（代）（代）to make a gentleman. 十年树木，百年树人。十年树木，百年树人。I. 单项选择单

26、项选择1. He didnt make _ clear when and where the meeting would be held. (天津天津2007) A. this B. that C. it D. these 2. _ is our belief that improvements in health care will lead to a stronger, more prosperous economy. (浙江浙江2006)A. As B. That C. This D. It3. The doctor advised Vera strongly that she shou

27、ld take a holiday, but _ didnt help. (2005全国卷全国卷III)A. it B. she C. which D. he4. Id appreciate _ if you would like to teach me how to use the computer. (山东山东2006)A. thatB. it C. this D. youII. 单句改错单句改错下面的句子选自高考试题的改错部分，下面的句子选自高考试题的改错部分，用你的火眼金睛把错误找出来吧！用你的火眼金睛把错误找出来吧！1. You wont find difficult to get

28、to the city center. (2004全国卷全国卷IV)2. I know there is not easy to be a teacher. (湖北湖北2004)3. This is not surprising that the Silver Ghost was regarded as “the best car in the world”.find后加后加itthere itThis ItSee you next time!1. it 指刚提到的事物，以避免重复指刚提到的事物，以避免重复:Xian is a beautiful city, isnt it?2. 也可以指动物、未知的人或婴儿也可以指动物、未知的人或婴儿:Is this your dog？No, it isnt.一、一、it 作人称代词作人称代词二、二、it 作非人称代词作非人称代词 it 指天气、时间、日期、距离、价值、度量、指天气、时间、日期、距离、价值、度量、温度、环境等，称为非人称的温度、环境等，称为非人称的it： 1. 指天气：指天气： It is a lovely day, isnt it? It is a bit windy.七七. It的一些习惯用法的一些习惯用法uHow is it with your study? 学习好吗？学习好吗？uThats