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   1、陈述句的强调句型:It is/ was + 被强调部分(通常是主语、宾语或状语)+ that/ who(当强调主语且主语指人)+ 其它部分。
   e.g. It was yesterday that he met Li Ping.
   2、一般疑问句的强调句型:同上,只是把is/ was提到it前面。
   e.g. Was it yesterday that he met Li Ping?
   3、特殊疑问句的强调句型:被强调部分(通常是疑问代词或疑问副词)+ is/ was + it + that/ who + 其它部分?
   e.g. When and where was it that you were born?
   4、强调句例句:针对I met Li Ming at the railway station yesterday.句子进行强调。
   强调主语:It was I that (who) met Li Ming at the railway station yesterday.
   强调宾语:It was Li Ming that I met at the railway station yesterday.
   强调地点状语:It was at the railway station that I met Li Ming yesterday.
   强调时间状语:It was yesterday that I met Li Ming at the railway station.
   5、注意:构成强调句的it本身没有词义;强调句中的连接词一般只用that, who,即使在强调时间状语和地点状语时也如此,that, who不可省略;强调句中的时态只用两种,一般现在时和一般过去时。原句谓语动词是一般过去时、过去完成时和过去进行时,用It was … ,其余的时态用It is … 。
  (二)not … until … 句型的强调句
   1、句型为:It is/ was not until + 被强调部分 + that + 其它部分
   e.g. 普通句:He didn't go to bed until/ till his wife came back.
   强调句:It was not until his wife came back that he went to bed.
   2、注意:此句型只用until,不用till。但如果不是强调句型,till, until可通用;因为句型中It is/ was not … 已经是否定句了,that后面的从句要用肯定句,切勿再用否定句了。
   1、It is/ was … that … 结构不能强调谓语,如果需要强调谓语时,用助动词do/ does或did。
   e.g. Do sit down. 务必请坐。
   He did write to you last week. 上周他确实给你写了信。
   Do be careful when you cross the street. 过马路时,务必(千万)要小心啊!
   2、注意:此种强调只用do/ does和did ,没有别的形式;过去时用did ,后面的谓语动词用原形。
   e.g. You cannot eat your cake but have it.(it代替前面的cake)
   Although we cannot see it, there is air all around us. (it代替后面的air)
   They say he has left town, but I don't believe it. (it代替前面They…town分句中的情况)
  e.g. Yesterday we saw a big tree. It was fully twenty metres high. (it代替前面的tree)
   The baby cried because it was hungry. (it代替前面的baby)
   e.g. ---- Someone is knocking at the door, Peter. ---- Who is it? ---- It's me.
   ---- Who are singing? ---- It is the children.
   ---- The light is still on in the lab. It must be the third-year students doing the experiment.
   e.g. ---- Do you still have the bicycle? ---- No, I have sold it.
   ---- Is this knife yours? ---- No. It is Xiao Zhang's. Mine is the one on the desk.
   e.g. The climate of South China is mild(温和的); I like it very much.(it指the climate of South China)
   The climate of South China is much better than that of Japan.(that指the climate)
   It is fine (rainy, windy, etc.).
   It is noon.
   It is a half hour's walk to the factory.
   It is eighteen square metres in area.
   What does it matter?
   用以帮助改变句子结构,使句子的某一成分受到强调。"It is (was) + 所强调的成分 + that (who) + 其它成分。"在这个句型中,it本身没有词义。详见"一、强调句"。
   为了使句子平衡,常采用形式主语(或宾语)it ,而把真正的主语(或宾语)置于句子后面。通常引导词it与它所代替的句子成分中间要夹有某些词。
   e.g. It takes half an hour to go there on foot.(It与to go there on foot之间夹有takes half an hour四个词)
   We thought it strange that Mr Smith did not come last night. (it与that从句中间夹有 strange)
   e.g. You may depend on it that they will support you.(因为介词on之后一般不直接接that引导的宾语从句。注意:it不是多余的,不能当作错句)
  1. My bike is missing. I can't find ____ anywhere.
   A. one B. ones C. it D. that
  2. ---- Who's that? ---- ____ Professor Li.
   A. That's B. It's C. He's D. This's
  3. ____ was Jane that I saw in the library this morning.
   A. It B. He C. She D. That
  4. ---- Have you ever seen a whale alive? ---- Yes, I've seen ____.
   A. that B. it C. such D. one
  5. The color of my coat is different from ____ of yours.
   A. this B. that C. it D. one
  6. ____ will do you good to do some exercise every morning.
   A. It B. There C. Those D. You
  7. We think ____ our duty to pay taxes to our government.
   A. that B. this C. its D. it
  8. The climate of Shanghai is better than ____ of Nanjing.
   A. that B. it C. which D. what
  9. ____ four years since I joined the Army.
   A. There was B. There is C. It was D. It is
  10. How long ____ to finish the work?
   A. you'll take B. you'll take it C. will it take you D. will take you
  11. It was through Xiao Li ____ I got to know Xiao Wang.
   A. who B. whom C. how D. that
  12. It was in the rice fields ____ we had our league meeting.
   A. where B. that C. in which D. on which
  13. It was on October 1st ____ new China was founded.
   A. which B. when C. as D. that
  14. Was it because he was ill ____ he asked for leave?
   A. and B. that C. that's D. so
  15. Mary speaks in a low voice; ____ is difficult to know what she is saying.
   A. it B. that C. so D. she
  16. It was ____ I met Mr Green in Shanghai.
   A. many years that B. many years before C. many years ago that D. many years when
  17. ____ is not everybody ____ can draw so well.
   A. It, all B. It, that C. There, who D. There, that
  18. So ____ that no fish can live in it.
   A. shallow is the lake B. the lake is shallow C. shallow the lake is D. is the lake shallow
   e.g. (I) Thank you for your help.(括号内为省略的词语,下同)
   (I) see you tomorrow. (It) Doesn't matter.
   e.g. (There is) No smoking. (Is there) Anything wrong? Why (do you) not say hello to him?
   e.g. ---- Are you going there? ---- I'd like to (go there).
   He did not give me the chance, though he had promised to (give me the chance).
   e.g. ---- Are you an engineer? ---- No, but I want to be.
   ---- He hasn't finished the task yet. ---- Well, he ought to have.
   e.g. ---- Are you thirsty? ---- Yes, I am (thirsty).
   e.g. Let's meet at the same place as (we met) yesterday.
   ---- Have you finished your work? ---- (I have) Not (finished my work) yet.
   e.g. My father is a doctor and my mother (is) a nurse.
   I study at college and my sister (studies) at high school.
   e.g. (I'm) Sorry to hear that you are ill.
   (It is a) Pity that he missed such a good chance.
   e.g. ---- Is he coming back tonight? ---- I think so.
   ---- Is he feeling better today? ---- I'm afraid not.
   这种用法常见的有:How so? Why so? Is that so? I hope so. He said so 及I suppose not. I believed not. I hope not等。(但I don't think so比I think not更常用)。
   e.g. I told him to sit down and wait for a moment.
  ②、某些使役动词(如let, make, have)及感官动词(如see, watch, notice, hear, feel, look at和listen to等)后面作宾语补足的不定式一定要省去to,但在被动语态中须把to复原。
  e.g. ---- I saw the boy fall from the tree. ---- The boy was seen to fall from the tree.
  e.g. The boy did nothing but play.
  3、在某些状语从句中,从句的主语与主句主语一致时,可省去"主语 + be"部分。(参看"状语从句"有关部分)
  e.g. The sooner (you do it), the better (it will be).
   1、单词(多是副词),如:besides, however, otherwise, therefore, though等。
   e.g. She is looking fit, though. 他看起来倒是健康。
   I can, however, discuss this when I see you.
   e.g. China and India, for example, are neighbours.
   By the way, where are you from?
   e.g. He is an honest man, I believe.
   Jack, as far as I know, isn't clever.
   e.g. You know that I think you are wrong. 我认为,你明白你错了。
   What on earth do you mean? 你究竟是什么意思?
   e.g. He got the news from nobody knows where. 他这消息谁也不知道是从哪儿得来的。
   下面这种复杂的特殊疑问句,也可认为包含有"插入语"。这种疑问句(有的语法书也称为"混合疑问句"或"连锁疑问句")常用来征询对方对某一疑问点的看法、判断、认识、猜度或请求对方重复一遍说过的话。口语中出现频率极高。常用动词有say, suppose, guess, believe, consider, think, imagine 等。
   e.g. How long did you say she would stay here?
   When do you suppose they'll be back?
   How old did you think she was
   by the way 顺便说,顺便问一下;so far 到目前为止;and so on 等等;on the contrary 相反; no wonder 不足为奇;as a matter of fact 事实上;come along 快点,来吧;in other words 换句话说;as usual 如同以往;as a result 因此,结果。
  1. ---- Won't you have another try? ---- ____.
   A. Yes, I will B. Yes, I won't C. Yes, I will have D. Yes, I won't have
  2. ---- I won't do it any more. ---- ____?
   A. Why don't B. Why don't do it any more C. Why not D. Why not do
  3. ---- Do you think it will snow tomorrow? ---- ____.
   A. No, I don't think B. I don't think C. No, I don't so D. I don't think so
  4. ---- Will he fail in the exam? ---- ____.
   A. Don't hope to B. Let's hope not C. Not hope so D. Let's hope not to
  5. ____ usual, I have forgotten something.
   A. As B. As it is C. It's D. That is
  6. ____ she a man, she might be elected president.
   A. If B. Unless C. Was D. Were
  7. ____ I had time, I would have played it again.
   A. If B. Unless C. Had D. When
  8. ____ it rain tomorrow, I'd stay at home.
   A. Should B. Would C. When D. If
  9. I like sports and ____ my brother.
   A. so B. so does C. so is D. so likes
  10. Francis, ____ born in Kentucky, lived and practised law in Missouri.
   A. was B. He was C. who is D. although
  11. ---- Aren't you the manager? ---- No, and I ____.
   A. don't want B. don't want to C. don't want to be D. don't
  12. ---- Have you fed the dog? ---- No, but ____.
   A. I am B. I'm just going to C. I'm D. I'm just going
  13. Your performance in the driving test didn't reach the required standard(标准) - ____, you failed.
   A. in the end B. after all C. in other words D. at the same time
  14. How long ____ she would stay here?
   A. did she say B. she said C. did D. /
  15. ____ could do such thing?
   A. Whom do you think B. Who do you think C. Do you think whom D. Did you think who
  1. John was ill. Have you heard about ____?
   A. this B. he C. it D. the one
  2. Hurry up! ____ getting darker and darker.
   A. The sky is B. It's C. Weather is D. Time is
  3. It's the third time ____ I have been here.
   A. that B. when C. after D. who
  4. It was simply for that reason ____ I wouldn't tell him the truth.
   A. why B. which C. so D. that
  5. Was it in the place ____ the last emperor died?
   A. where B. that C. which D. in which
  6. ____ is no difference between A and B.
   A. It B. Where C. There D. What
  7. It ____ Mike and Mary who helped the old man several days ago.
   A. was B. were C. are D. had been
  8. He said, " ____ a long way to school. ____ a long way to go yet before we arrive."
   A. It is, It is B. There is, There is C. There is, It is D. It is, There is
  9. I don't like ____ you speak to her.
   A. the way B. the way in that C. the way which D. the way of which
  10. If you go to Xi'an, you'll find the palaces there more magnificent than commonly ____.
   A. supposing B. suppose C. to suppose D. supposed
  11. ____ is a fact that English is being accepted as an international language.
   A. There B. This C. That D. It
  12. It was about 600 years ago ____ the first clock with a face and an hour hand was made.
   A. that B. until C. before D. when
  13. It was not until 1920 ____ regular radio broadcast began.
   A. while B. which C. that D. since
  14. ---- Do you mind my taking this seat? ---- ____. A. Yes, sit down please B. No, of course not C. Yes, take it please D. No, you can't take it
  15. ---- I'll be away on a business trip. Would you mind looking after my cat? --- Not at all. ____.
   A. I've no time B. I'd rather not C. I'd like it D. I'd be happy to
  16. The boy wanted to ride his bicycle in the street, but his mother told him _____.
   A. not to B. not to do C. not do it D. do not to
  17. It was not until she came to see us ____ her mother was ill in bed.
   A. when we knew B. that did we knew C. that we knew D. that did we know
  18. ---- This store has such high prices. ---- I agree. Never again ____ here.
   A. I will shop B. will I shop C. I do shop D. shop I
  19. ____ was his kindness that everyone praised him.
   A. It B. What C. So D. Such
  20. ____, he would have passed the exam.
   A. If he were to study B. If he studied hard C. Had he studied hard D. Should he study hard
  21. ---- David has made great progress recently. ---- ____, and ____. A. So he has, so have you B. So he has, so you have C. So has he, so have you D. So has he, so you have
  22. No sooner ____ they rushed out into the street. A. did they hear the news than
   B. did they hear the news when C. had they heard the news than D. had they heard the news when
  23. He was unable to make such progress, ____.
   A. hard as he tried B. as hard he tried C. hard he has tried D. tried hard as he
  练习一、1~5 CBADB 6~10 ADADC 11~15 DBDBA 16~18 CBA
  练习二、1~5 ACDBA 6~10 DCABD 11~15 CBCAB
  练习三、1~5 CBADB 6~10 CADAD 11~15 DACBD 16~20 ACBDC 21~23 ACA

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