it用法公開課ppt

1、 The use of “it”How much do you know about “it”?The Use of “it”代詞代詞 it引導(dǎo)詞引導(dǎo)詞 itIt句型歸納句型歸納 Sentences With “it” 1. 做人稱代詞，代替前文提到過的事物。做人稱代詞，代替前文提到過的事物。代詞代詞 itYou body becomes accustomed to having nicotine in it. 2. 用以代替指示代詞用以代替指示代詞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嬰兒。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 4. 做做非人稱代詞，非人稱代詞，指代指代時間、天氣、距離、時間、天氣、距離、環(huán)境、季節(jié)、日期、價值等。環(huán)境、季節(jié)、日期、價值等。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. 代詞代詞 it -Whats the date today? -Its May 15, 2013.-Whats the cost of the T-shirt?-It is 150 yuan.時間時間天氣天氣距離距離環(huán)境環(huán)境季節(jié)季節(jié)日期日期價值價值 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天氣天氣距離距離未知的人未知的人形式主語形式主語note2、It is no good smoking.3、It is am amazing that at my age I am still fit.真正主語真正主語真正主語真正主語形式主語形式主語形式主語形式主語真正主語真正主語形式主語形式主語= 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.引導(dǎo)詞引導(dǎo)詞 it Summary： it作作形式主語形式主語，代替由不定式（或不，代替由不定式（或不定式復(fù)合結(jié)構(gòu)）、動名詞或從句表示的真正主語。定式復(fù)合結(jié)構(gòu)）、動名詞或從句表示的真正主語。 此處此處adj. 通常為通常為描述人描述人的形容詞：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. 此處此處

7、adj. 通常為通常為描述事件描述事件的形容詞：的形容詞：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 + 名詞名詞 + to do sth.常用的名詞有：常用的名詞有：fun; pity, shame, pleasure.不可數(shù)名詞不可數(shù)名詞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. 常見的常見的adj.有有:possible;clear;obvious;true,etc It is very clear that he grows like a tree. (1) It is + adj. + that 從句從句(3) It is + v-ed + that 從句從句 It is said (reported/believed/ thought/known/ told/ suggested.) that . 譯為譯為“據(jù)說（據(jù)報道，據(jù)據(jù)說（據(jù)報道，據(jù)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 從句從句It seems that there is no way out of our difficulty.(2) It is + n. + that 從句從句 常見的常見的n.有有:a shame; a pity, a fact,etc It is a pity that you missed the football match. 作作形式賓語形式賓語，代替由

11、不定式、動名詞或從，代替由不定式、動名詞或從句表示的真正賓語。句表示的真正賓語。He feels it his duty to help others.We thought it no use doing that.引導(dǎo)詞引導(dǎo)詞 - it He made it clear that he was not interested in this subject. 他非常清楚地表示他對那門學(xué)科不感興趣。他非常清楚地表示他對那門學(xué)科不感興趣。注意注意：常用的動詞有：常用的動詞有think, believe, make, find, consider, feel等。等。 在動詞在動詞appreciate

12、, dislike,hate，like, love等等后面代替后面代替if或或when等引導(dǎo)的從句。等引導(dǎo)的從句。I would appreciate it if you can come.it 代替代替if引導(dǎo)的賓語引導(dǎo)的賓語從句。從句。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句型改寫句子，意思不變。句型改寫句子，意思不變。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句轉(zhuǎn)換為句轉(zhuǎn)換為B句，意思不變。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 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強調(diào)結(jié)構(gòu) to satisfy his need 3、辨別、辨別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強調(diào)結(jié)強調(diào)結(jié)構(gòu)構(gòu) It is never

25、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. 摔倒容易爬起來難。摔倒容易爬起來難。 It is no use crying over spilt（溢出的）（溢出的）milk. 覆水難收。覆水難收。Proverbs with “It” It never rains but it pours(潑水潑水). 不鳴則已，一鳴驚人不鳴則已，一鳴驚人。 It takes three generations（代）（代）to make a gentleman. 十年樹木，百年樹人。十年樹木，百年樹人。I. 單項選擇單

26、項選擇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全國卷全國卷III)A. it B. she C. which D. he4. Id appreciate _ if you would like to teach me how to use the computer. (山東山東2006)A. thatB. it C. this D. youII. 單句改錯單句改錯下面的句子選自高考試題的改錯部分，下面的句子選自高考試題的改錯部分，用你的火眼金睛把錯誤找出來吧！用你的火眼金睛把錯誤找出來吧！1. You wont find difficult to get

28、to the city center. (2004全國卷全國卷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 指剛提到的事物，以避免重復(fù)指剛提到的事物，以避免重復(fù):Xian is a beautiful city, isnt it?2. 也可以指動物、未知的人或嬰兒也可以指動物、未知的人或嬰兒:Is this your dog？No, it isnt.一、一、it 作人稱代詞作人稱代詞二、二、it 作非人稱代詞作非人稱代詞 it 指天氣、時間、日期、距離、價值、度量、指天氣、時間、日期、距離、價值、度量、溫度、環(huán)境等，稱為非人稱的溫度、環(huán)境等，稱為非人稱的it： 1. 指天氣：指天氣： It is a lovely day, isnt it? It is a bit windy.七七. It的一些習(xí)慣用法的一些習(xí)慣用法uHow is it with your study? 學(xué)習(xí)好嗎？學(xué)習(xí)好嗎？uThats