it的用法.ppt

1、Grammar,The use of “it”,Read and analyze the following sentences.,What is this? It is a cellphone. What is that? It is his dictionary. Whose book is this? It is Mr Chengs. Where is your English book? It is here. My cat is missing, I cant find it anywhere. Question: What does “it” in these sentences

2、refer to? Draw a conclusion: it -词性? _ 可以用作人称代词，代指_ 还可以替代指示代词_ 或_.,Pron.,前文提到的事物.,that.,this.,Read and analyze the following sentences.,It is Friday today. It was very cold last Monday. It is about 8:30 now. It is about 25km from Luotian to Xishui. It lies in the south of Fengshan Town. It is 40C !

3、You got a high fever! Conclusion :it 可以用作非人称代词，表示_,_,_,_,_,_等。,Date,weather,time,distance,place,Temperature,日期,天气,时间,距离,地点,温度,3. It is likely that he will succeed.,2. It is no good smoking.,真正主语,真正主语,形式主语,形式主语,真正主语,形式主语,= _ is bad.,To smoke,= _ is no good.,Smoking,= _is likely.,That he will succeed,

4、1. It is bad to smoke.,Read and analyze the following sentences.,I think it no use arguing with him. I found it very interesting to study English. He made it clear that he was not interested in this subject.,分析：it是 _.,形式宾语,形式宾语,真正宾语,形式宾语,真正宾语,形式宾语,真正宾语,it做形式主语,（1）It + be + 名词 + that从句 It is a pity/a

5、 fact/a wonder/no wonder that （2）It + be + 形容词 + that从句 It is important/likely/possible/right that （3）It + 不及物动词 + that 从句 It seems/happens/appears that （4） It + be + 动词的过去分词 + that从句 It is said/believed/known/reported that,It is said that Tom is a faithful worker. It is reported that the murderer h

6、as been arrested. It is believed that all the students have done their best.,= Tom _ _ _ _ a faithful worker.,is said to be,= The murderer is reported to have been arrested.,= All the students are believed to have done their best,it做形式主语,（5）It + be + 形容词/名词 + (for sb./of sb.) + to do Its careless of

7、 her to make a spelling mistake. Its hard for me to finish it in two days. （6）It + be + 名词 + doing Its fun/no use/no good/a waste of time doing sth.,Lets practice !,To give up smoking is very difficult. 2. Arguing with a man like him is of no use. 3. Dont speak ill of her. Its wrong. 4. He didnt pas

8、s the exam. It is a shame. 5. He had no desire for success. It is quite clear.,It is very difficult to give up smoking.,It is no use arguing with a man like him.,It is wrong (for you) to speak ill of her.,It is a shame that he didnt pass the exam.,It is quite clear that he had no desire for success.

9、,6. Whether he will come or not doesnt matter. 7. When we will celebrate the art festival is still unknown. 8. That he turned out to be thief surprised me a lot. 9. The news has reached every part of the world. Someone says that.,It doesnt matter whether he will come or not.,It is still unknown when

10、 we will celebrate the art festival.,It surprised me a lot that he turned out to be thief.,It is said that the news has reached every part of the world.,10. Whether it will do us harm or good remains to be seen. 11. Working for him is fun. 12. Does wasting a little money matter? 13. How many people

11、are to come is still a question. 14. That he is still alive is a wonder.,It remains to be seen whether it will do us harm or good.,It is fun working for him.,Does it matter wasting a little money?,It is still a question how many people are to come.,It is a wonder that he is still alive.,It is known

12、to us that bird flu(禽流感) hit China again.,It is said that Li Yuchun got more than one million yuan for the advertisement.,15 Bird flu(禽流感) hit China again. That is known to us.,16 Li Yuchun got more than one million yuan for the advertisement. People say that.,Page 21,Page 21,1. It is difficult to g

13、ive up smoking. 2. It seems that some young people think they look attractive when they smoke. 3. It is believed that smoking causes cancer. 4. It is no use trying to quit on a stressful day. 5. It is astonishing that China produces one-third of the worlds cigarettes. 6. It is illegal to advertise c

14、igarettes in this country. 7. It is wonderful that my father has quit smoking at last. 8. It was a dark and stormy night when the old man started his journey. 9. It is likely that you could suffer from bad health if you keep smoking. 10. It is necessary for you to take pills to control your blood pr

15、essure.,Discovering useful structures,误用形式主语的几种情况,A:在该用 it作形式主语的地方而误用 其 他词 Is _ necessary to tell his father everything? A. it B. that C. what D.he B:在不该用it作形式主语的地方而误用形式主语 A. There B. It C. He D. That 1._must be something wrong with the machine. 2._is no need to send for the doctor 3._is no doubt th

16、at he is qualified for the job A. It B. which C. As D. What 4._ is known to us that the earth runs around the sun . 5._ is known to us, the earth runs around the sun . 6._ is known to us is that the earth runs around the sun.,A,A,A,A,It,As,What,that,is,It is/was + 时间段 + since It is five months since

17、 I arrived in New York. 我到纽约已经五个月了。 It is five months since I was in New York. 我离开纽约已经五个月了。 （注意：终止性动词表示从动作发生时算起；如果是状态动词或持续性动词，则从动作或状态结束时算起。）,特殊句型,It is two years since I smoked. It is two years since I began to smoke.,我戒烟两年了。,我抽烟两年了。,It is + 时间段 + before 过才/就 这个句型和上面句型中时间都是时间段，如long、years、months、wee

18、ks、five days、three hours、twenty minutes等。主句的时态多用一般将来时或一般过去时。 It will be several years before we meet again. 我们要过好几年才能再见面。 It was not long before they set out for the front. 不久他们就出发去了前线。 It wont be long before more ordinary families own cars. 不久就会有更多的普通家庭拥有汽车,特殊句型,用于强调句型中,It is/was + 被强调部分 + that/who

19、 .,I met Tom in the park yesterday.,1) It was I who met Tom in the park yesterday.,2) It was Tom who I met in the park yesterday.,3) It was in the park that I met Tom yesterday.,4) It was yesterday that I met Tom in the park.,It was five oclock _I got home. It was at five oclock_ I got home.,when,th

20、at,特殊句型,注 意,强调句用以强调主语，宾语，介词宾语以及状语。（强调人时用that和who whom皆可） It is he who that is to blame 是她该受到谴责。 ( ) It was the girl whom that I met just now 我刚才遇见的就是这个女孩。 ( ) It was to Tom whom the teacher had talked 老师与其谈话的那个人是汤姆。 （ ） It was on Monday night that all this happened 所有这一切就是在星期一的晚上发生的。（ ）,主语,宾语,介词宾语,状

21、语,Mike found a bag on the playground this morning.,用强调句型改写,It was a bag that Mike found on the playground this morning.,画线部分提问,What was it that Mike found on the playground this morning?,画线部分 强调并提问,Where was it that Mike found a bag this morning?,画线部分 强调并提问,When was it that Mike found a bag on the p

22、layground?,画线部分 强调并提问,Who was it that found a bag on the playground?,与I dont know合并,I dont know what it was that Mike found on the playground this morning. I dont know where it was that Mike found a bag this morning. I dont know when it was that Mike found a bag on the playground. I dont know who it

23、 was that found a bag on the playground this morning.,It is not until + 被强调部分 + that . 该句型也是强调句型。主要用于强凋时间状语，译成汉语 “直到才”，可以说是not . until . 的强调形式。 It was not until she took off her dark glasses that I realized she was a famous film star. = I didnt realize she was a famous film star until she took off h

24、er dark glasses. = Not until she took off her dark glasses did I realize she was a famous film star.,I didnt realize how much I loved my parents until I went abroad.,用强调句型改写,It was not until I went abroad that I realized how much I loved my parents.,用倒装句型改写,Not until I went abroad did I realize how

25、much I loved my parents.,It 常用的固定搭配,make it （1）在口语当中相当于succeed，表示：成功、做到、说定、赶上、及时到达 Its hard to make it to the top in show business. （2）在口语中相当于fix the date for，表示“约定好时间” Shall we meet next week？ OK. We just make it next Saturday.,2. take it/things easy 相当于Dont worry or dont hurry. 用来劝告别人，表示“不要慌，别担心，沉

26、住气” Take it easy！He will do it well. 3. It all depends/that all depends 在口语中，相当于it hasnt been decided yet，表示“那得看情况，还没有定下来” Are you going to the countryside for holiday？ It/That all depends.,4. Its up to sb. 在口语中，相当于its decided by sb. 表示“由决定，由负责，取决于” Shall we go out for dinner？ Its up to you.,5. Got

27、it? 明白了吗；懂了吗,owe it to sb. that leave it to sb. that take it for granted that keep it in mind that,7. enjoy/like/love/dislike/appreciate/hate/dont mind it/be fond of/feel like/see to/depend on/ insist on it that/if/when,8. make it a rule that,1.It wasnt until nearly a month later _(我收到)the managers reply. (receive) 2.Was it because it snowed last night _(他没来)?(come) _(在哪儿)you met the Englishman? (be) 4. _( 我们都知道)that smoking is harmful to health. (be) 5. _(我们都知道) is that eating too much does harm to our health. (be) 6. _(众所周知), Taiwan is part of China. (be),that he did