it用法公開(kāi)課pPPT課件

1、How much do you know about “it”?第1頁(yè)/共30頁(yè)The Use of “it”代詞 it引導(dǎo)詞 itIt句型歸納 Sentences With “it”第2頁(yè)/共30頁(yè) 1. 做人稱代詞，代替前文提到過(guò)的事物。代詞 itYou body becomes accustomed to having nicotine in it. 2. 用以代替指示代詞this, that。- Whose text-book is that? - Its hers.- Whats this?- Its a flag. As you know, if you do the same t

2、hing over and over again, you begin to do it automatically. 3. 用以代替未知的人或嬰兒。 Someone is knocking at the door. Go and see who it is. your body the thing第3頁(yè)/共30頁(yè) 4. 做非人稱代詞，指代時(shí)間、天氣、距離、環(huán)境、季節(jié)、日期、價(jià)值等。Its time for class. It is summer now and it gets hotter and hotter.Its about two kilometers from here to my

3、 home.It is very quiet in our classroom every night. 代詞 it -Whats the date today? -Its May 15, 2013.-Whats the cost of the T-shirt?-It is 150 yuan.時(shí)間時(shí)間天氣天氣距離距離環(huán)境環(huán)境季節(jié)季節(jié)日期日期價(jià)值價(jià)值第4頁(yè)/共30頁(yè) 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

4、 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天氣距離未知的人形式主語(yǔ)note第5頁(yè)/共30頁(yè)2、It is no good smokin

5、g.3、It is am amazing that at my age I am still fit.真正主語(yǔ)真正主語(yǔ)真正主語(yǔ)真正主語(yǔ)形式主語(yǔ)形式主語(yǔ)形式主語(yǔ)形式主語(yǔ)真正主語(yǔ)真正主語(yǔ)形式主語(yǔ)形式主語(yǔ)= 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.引導(dǎo)詞 it Summary： it作形式主語(yǔ)，代替由不定式（或不定式復(fù)合結(jié)構(gòu)）、動(dòng)名詞或從句表

6、示的真正主語(yǔ)。第6頁(yè)/共30頁(yè) 此處adj. 通常為描述人的形容詞：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. 此處adj. 通常為描述事件的形容詞：easy; hard; difficult; necessary; likely; impossible; important; useful; dangerous It is important

7、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.第7頁(yè)/共30頁(yè)e.g. It is fun to go out for a walk. （3）It is + 名詞 + to do sth.常用的名詞有：fun; pity, shame, pleasure.不可數(shù)名詞It is a shame to be

8、 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. It took me 3 days to prepare this lesson.第8頁(yè)/共30頁(yè) 常見(jiàn)的常見(jiàn)的adj.有有:possible;clear;obvious;true,etc It is very clear that he grows like a t

9、ree. (1) It is + adj. + that 從句(3) It is + v-ed + that 從句 It is said (reported/believed/ thought/known/ told/ suggested.) that . 譯為譯為“據(jù)說(shuō)（據(jù)報(bào)道，據(jù)據(jù)說(shuō)（據(jù)報(bào)道，據(jù)悉悉）”。 It is said that he has gone to Beijing. It is reported that Chairman Xi will visit Hangzhou. (4) It happens/ seems/appears+ that 從句It seems that

10、 there is no way out of our difficulty.(2) It is + n. + that 從句 常見(jiàn)的常見(jiàn)的n.有有:a shame; a pity, a fact,etc It is a pity that you missed the football match. 第9頁(yè)/共30頁(yè) 作形式賓語(yǔ)，代替由不定式、動(dòng)名詞或從句表示的真正賓語(yǔ)。He feels it his duty to help others.We thought it no use doing that.引導(dǎo)詞 - it He made it clear that he was not in

11、terested in this subject. 他非常清楚地表示他對(duì)那門學(xué)科不感興趣。注意：常用的動(dòng)詞有think, believe, make, find, consider, feel等。 第10頁(yè)/共30頁(yè) 在動(dòng)詞appreciate, dislike,hate，like, love等后面代替if或when等引導(dǎo)的從句。I would appreciate it if you can come.it 代替if引導(dǎo)的賓語(yǔ)從句。第11頁(yè)/共30頁(yè)1.Giving up smoking is difficult. It is 2. Some young people think they

12、look attractive when they smoke. It seems 3. Most people believe smoking causes cancer. It is believed4.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.trying to quit on a stre

13、ssful day. 1、用it句型改寫句子，意思不變。第12頁(yè)/共30頁(yè)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 wonderful8. The night was dark and stormy when the old man started h

14、is 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.d

15、ark and stormy night when the old man .that you could suffer from bad health if .for you to take pills to control your .第13頁(yè)/共30頁(yè) 2、用it句型把A句轉(zhuǎn)換為B句，意思不變。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 matc

16、h.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 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

17、 might go without me. 4A. Memorizing 20 English words a day is easy for me. B.I find _ _ _ _20 English words a day.make it clearit easy to memorize第14頁(yè)/共30頁(yè)5A.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 a

18、nd runs around the playground for half an hour every day.He has made that a rule. B.He has made _ _ _ _ _ _ _ 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 morni

19、ng. B._ _ _ _ a fire took place in the experimental building this morning.8A.I spent two hours writing the essay. B._ _ _ _ _ to write the essay. It is reported that It took me two hours第15頁(yè)/共30頁(yè) Everyone consider it important to have enough sleep. The amount of sleep needed varies from person to pe

20、rson and it depends on the age of the person and the conditions in which sleep takes place. The young may need more 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

21、need. It is then a matter of good judgment to satisfy his need. Sleep is essential for our health. It is enough sleep that can make one bring back his strength and get ready for a days work.is said thatto have enough sleepisthat強(qiáng)調(diào)結(jié)構(gòu) to satisfy his need 3、辨別it的用法。第16頁(yè)/共30頁(yè)Happy New Year! the greeting

22、 will be said and heard as a new year arrives. It is at this time of the year that families and friends get together 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 ye

23、ar by what they did or ate on the first day of the year. For that reason, it has become common for people to celebrate 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

24、 circle, completing a years cycle.It is at the time of the year thatit was thought thatnew year強(qiáng)調(diào)結(jié)構(gòu)第17頁(yè)/共30頁(yè)第18頁(yè)/共30頁(yè) It is never too old to learn. 活到老，學(xué)到老。活到老，學(xué)到老。 It is easier to fall than to rise. 摔倒容易爬起來(lái)難。摔倒容易爬起來(lái)難。 It is no use crying over spilt（溢出的）milk. 覆水難收。覆水難收。Proverbs with “It” It never ra

25、ins but it pours(潑水). 不鳴則已，一鳴驚人不鳴則已，一鳴驚人。 It takes three generations（代）to make a gentleman. 十年樹(shù)木，百年樹(shù)人。十年樹(shù)木，百年樹(shù)人。第19頁(yè)/共30頁(yè)I. 單項(xiàng)選擇1. He didnt make _ clear when and where the meeting would be held. (天津2007) A. this B. that C. it D. these 2. _ is our belief that improvements in health care will lead to

26、a stronger, more prosperous economy. (浙江2006)A. As B. That C. This D. It第20頁(yè)/共30頁(yè)3. The doctor advised Vera strongly that she should take a holiday, but _ didnt help. (2005全國(guó)卷III)A. it B. she C. which D. he4. Id appreciate _ if you would like to teach me how to use the computer. (山東2006)A. thatB. it

27、 C. this D. you第21頁(yè)/共30頁(yè)II. 單句改錯(cuò)下面的句子選自高考試題的改錯(cuò)部分，用你的火眼金睛把錯(cuò)誤找出來(lái)吧！1. You wont find difficult to get to the city center. (2004全國(guó)卷IV)2. I know there is not easy to be a teacher. (湖北2004)3. This is not surprising that the Silver Ghost was regarded as “the best car in the world”.find后加itthere itThis It第22

28、頁(yè)/共30頁(yè)See you next time!第23頁(yè)/共30頁(yè)1. it 指剛提到的事物，以避免重復(fù):Xian is a beautiful city, isnt it?2. 也可以指動(dòng)物、未知的人或嬰兒:Is this your dog？No, it isnt.一、it 作人稱代詞二、it 作非人稱代詞 it 指天氣、時(shí)間、日期、距離、價(jià)值、度量、溫度、環(huán)境等，稱為非人稱的it： 1. 指天氣： It is a lovely day, isnt it? It is a bit windy.第24頁(yè)/共30頁(yè)七. It的一些習(xí)慣用法uHow is it with your study? 學(xué)習(xí)好嗎