(完整word版)虚拟语气及答案
虚拟语气精讲精练及答案
虚拟语气总览1. 英语中的三种语气英语共有三种语气，陈述语气、祈使语气和虚拟语气。
陈述语气用来讲述事实，有肯定、否定、询问和感叹等形式，谓语动词有人称、时态和数的变化；祈使语气用于提出请求、建议、劝告、命令和警告等，以动词原形起句，否定式句前加Don’t；虚拟语气表示说话人所言内容不是事实，而是一种假设、愿望、建议、请求、命令或猜测，有时只是说话者的主观愿望，或表达他/她的强烈情感，谓语动词用特殊形式。
2.ought to, would. 与过去事实相反1). If I had had much money at that time, I would have bought you what you want.2). If you had been more careful, the mistake might have been avoided.3). If you had taken my advice, you wouldn’t have made such a mistake.4). We wouldn’t have succeeded if it had not been for their help.5). If you had been here yesterday, you would have met the film star.6). If I had known more about giving first aid, I could have helped them.7). If you had got up earlier, you would have caught the train.8). If we had had enough rain last year, we could have gained a good harvest.9). If you had worked a little harder, you could have passed the final examination.10). If they had invited her to the party, she would have attended it..与现在事实相反1). If I were you, I would go there at once.2). If my classmates were here, they would help me.3). If I were you, I would accept the job.4). If classes were smaller, children would learn more.5). If I were ten years younger, I would start all over again.6). If I had enough money, I would buy a large house.7). If I had time, I would go shopping with you.8). If I knew all the answers to all your questions, I would be a genius.9). If he were here now, we would ask him about it.10). If I had time, I would study French.11). If I knew her number, I could ring her. (可惜我不知道)12). If there were no gravity, we should not be able to walk. (实际上地球引力始终存在。
(完整word版)虚拟语气(含表格)
虚拟语气类别用法例句If引导的条件从句与现在事实相反◇从句动词：过去式（be用were）◇主句动词：should/would/could/might+动词原形If he were here, he would help us.与过去事实相反◇从句动词：had+过去分词◇主句动词：should/would/could/might+have+过去分词If I had been free, I would havevisited you.与将来事实相反◇从句动词：过去式/ should+动词原形/were+不定式◇主句动词：should/would/could/might+动词原形If it should rain tomorrow, wewould not go camping.特殊有时，句子没有直接给出假设情况的条件，而须通过上下文或其他方式来判断，这种情况称为“含蓄虚拟条件句”，常见的判断词是“without,but for,but"But for his help, we would beworking now.当虚拟条件句的谓语动词含有were,should, had时，if可省略，而将were,should, had等词置于句首Had he learnt about computers,we would have hired him to workhere.有时，虚拟条件句中，主、从句的动作所虚拟的时间不一致，这种情况称为“错综虚拟条件句”If I had worked hard at school, Iwould be an engineer, too.其它状语从句as if引导的状语从句中动词用过去式或过去完成式They began to talk warmly as ifthey had known each other forlong.in order that / so that引导的状语从句中动词用can / could / may / might / would等+动词原形Turn on the light so that we cansee it clearly.宾语从句demand, suggest, order, insist后接的从句中动词为should+动词原形He suggested that we not changeour mind.wish后的从句中分别用过去式，过去完成式和should/would+动词原形表示与现在，过去和将来情况相反I wish I could be a pop singer.主语从句在It is necessary / important / strangethat…, It is suggested / demanded / ordered/ requested that…等从句中，谓语动词用should+动词原形It is strange that such a personshould be our friends.其它句型中It is time that…句型中动词用过去式或should+动词原形It’s high time that we left.would rather所接的从句中动词用过去式或者过去完成式I would rather you stayed at home now.If only句型中动词常用过去式或者过去完成式，表示强烈的愿望If only our dream had come true!1. If there were no subjunctive mood, English ____ much easier.A. will beB. would have beenC. could have beenD. would be2. If she had worked harder, she ____.A. would succeedB. had succeededC. should succeedD. would have succeeded3. — If he ____, he ____ that food.— Luckily he was sent to the hospital immediately.A. was warned; would not takeB. had been warned; would not have takenC. would be warned; had not takenD. would have been warned; had not taken4. If he ____ me his telephone number yesterday, I ____ able to ring him up now.A. told; would beB. had told; would beC. had told; would have beenD. told; am5. If I ____ you, I ____ to Australia with Mr. Smith.A. had been; would goB. were; had goneC. were; would have goneD. am; will go6. Without electricity, human life ____ quite different today.A. isB. will beC. would have beenD. would be7. Our monitor was absent. Otherwise I ____ the chair.A. would not takeB. didn't takeC. hadn't takenD. wouldn't have taken8. — The experiment has failed!— I suggest that you ____ again.A. tryB. tryingC. will tryD. would try9. His silence at the meeting suggested that he ____ to your plan.A. didn't agreeB. hadn't agreedC. wouldn't agreeD. not agree10. The father insisted his daughter ____ a rich man.A. would be engaged toB. be engaged toC. should engage toD. must be engaged to11. She insisted that she ____ ill of him behind him, but he didn't believe.A. hadn't spokenB. shouldn't speakC. wouldn't speakD. not speak12. — I stayed at a hotel while in New York.— Oh, did you? You ____ with Barbara.A. could have stayedB. could stayC. would stayD. must have stayed13. I was really anxious about you. You ____ home without a word.A. mustn't leaveB. shouldn't have leftC. couldn't have leftD. needn't leave14. There was plenty of time. She ____.A. mustn't have hurriedB. needn't have hurriedC. must not hurryD. couldn't have hurried15. I wish I ____ you yesterday.A. seenB. did seeC. had seenD. were to see16. If my lawyer ____ here last Saturday, he ____ me from going.A. had been; would have preventedB. had been; would preventC. were; would preventD. were; would have prevented17. He ____ you more help, even though he was very busy.A. might have givenB. might giveC. may have givenD. may give18. If it ____ for the snow, we ____ the mountain yesterday.A. were not; could have climbedB. were not; could climbC. had not been; could have climbedD. had not been; could climb19. I told Sally how to get there, but perhaps I ____ for her.A. had to write it outB. must have written it outC. should have written it outD. ought to write it out20. I didn't see your sister at the meeting. If she ____, she would have met my brother.A. has comeB. did comeC. cameD. had come21. When a pencil is partly in a glass of water, it looks as if it ____.A. breaksB. has brokenC. were brokenD. had been broken22. You didn't let me drive. If we ____ in turn, you ____ so tired.A. drove; didn't getB. drove; wouldn't getC. were driving; wouldn't getD. had driven; wouldn't have got23. She couldn't have answered the question if she _____ a few books on world history.A. hadn't readB. hasn't readC. wouldn't readD. didn't read24. If it ____ so hard, we'd go to town.A. isn't rainingB. weren't rainingC. doesn't rainD. has rained25. Our former math teacher died of cancer last term, otherwise he ____.A. will still workB. should still workC. would still have workedD. would still be working26. The soldier died in the hospital. He ____ if the doctor ____ on him two hours earlier.A. might be saved; operatedB. could be saved; had operatedC. could have been saved; had operatedD. had been saved; was operated27. It's time that you ____ home and I'd rather you ____ again tomorrow.A. are going; will comeB. go; are comingC. went; cameD. would go; would come28. I ____ you a more valuable present for your birthday, but I was short of money at that time.A. would buyB. had boughtC. would have boughtD. must have bought29. I went to the meeting yesterday because I ____ nothing about the discussion without attending it.A. didn't knowB. would knowC. knewD. would have known30. It was required that each student ____ enough food for the public.A. bringB. broughtC. would bringD. had brought31. He didn't come yesterday, or you ____ him.A. would seeB. were to seeC. might have seenD. had seen32. It was suggested yesterday that a meeting ____ to discuss the matter.A. will be heldB. would be heldC. should holdD. be held33. It's strange that he ____ without saying good-bye to us.A. should have gone outB. wentC. should go outD. goes out34. Nothing could have saved him even if he ____ without delay.A. would be tendedB. was tendedC. has been tendedD. had ben tended35. The manager was angry and ordered that this work ____ tomorrow.A. be finishedB. finishC. was finishedD. would finish36. He is talking so much about Britain as if he ____ there.A. had beenB. has beenC. wasD. had gone37. The young man insisted that he ____ nothing wrong and ____ free.A. did; setB. had done; should be setC. do; be setD. had done; must be set38. My suggestion was that the meeting ____ off till next week.A. to putB. be putC. should putD. would be put39. Had you listened to the doctor, you ____ all right now.A. areB. wereC. would beD. would have been40. It is requested that Li Ming ____ at the class meeting on behalf of us.A. will speakB. speaksC. would speakD. speak41. — I didn't catch the first train this morning.— You ____ the first train if you ____ earlier.A. would catch; had got upB. could catch; should get upC. would have caught; had got upD. would catch; got up42. You ____ earlier. The bus left a moment ago.A. would comeB. should have comeC. must comeD. could have come43. Without your help, we ____ this task.A. don't finishB. will not finishC. didn't finishD. would not have finished44. Mr. Fang spoke slowly in order that we ____ him.A. should followB. followC. might followD. followed45. — Have you ever been to Hong Kong?— No, but I wish I ____.A. haveB. willC. doD. had46. What should we do if it ____ tomorrow?A. should snowB. would snowC. snowD. will snow47. He ____ the test, but he wasn't careful enough.A. could have passedB. were able to passC. must have passedD. might be able to pass48. If there ____ not the Communist Party, we ____ a happy life.A. were; couldn't liveB. are; can't liveC. is; can't liveD. was; wouldn't live49. But for the leadership of out Party and Government, we ____ these splendid results.A. have achievedB. couldn't have achievedC. could have achievedD. would achieve50. — It was the drug, not the disease, that killed the boy.— He would be still alive today if he ____ that drug.A. not takeB. shouldn't have takenC. didn't takeD. hadn't taken。
虚拟语气知识点总结和题型总结(word)1
虚拟语气知识点总结和题型总结（word）1一、初中英语虚拟语气1．—I don’t know what to wear at the party.— If I you, I would wear a shirt and a tie.A．am B．is C．were D．was【答案】C【解析】试题分析：if从句的虚拟语气，对于现在的虚拟用一般过去式，be动词都用were,故选C.句意：——我不知道聚会该穿什么。
——如果我是你，我会穿一件衬衫加一条领带。
故选C 考点：if条件句的虚拟语气点评：if条件句的虚拟语气，是中考要求掌握的知识点，分为三种情况：表示与现在事实相反的情况，从句谓语动词用一般过去式（be用were），主句谓语动词用should/would/could/might +do;2.表示与过去的事实相反的情况，从句谓语动词用过去完成时，主句谓语动词用should/would/could/might+have done;3.表将来的事实相反的情况，从句谓语动词用should+动词/did/were to do，主句谓语动词用should/would/could/might +do。
2．If I _______ you, I would say another student could do it better.A．was B．were C．were D．are【答案】B【解析】【详解】句意：如果我是你，我会说另一个学生可以把它做得更好。
考查虚拟语气。
根据句意可知“现在事实”相反，此句是虚拟语气，be动词使用were；故选A。
3．If I _______ you, I _______ go there.A．is; will B．is; would C．were; would D．was; will【答案】C【解析】本题考查虚拟语气，if引导的与现在事实相反的虚拟语气。
从句用一般过去式，主句用过去将来时。
(完整版)if虚拟语气练习题及答案
(完整版)if虚拟语气练习题及答案如果虚拟语气练习题是一种能够帮助我们巩固和加深对于虚拟语气的理解的方法。
通过解答这些练习题，我们可以更好地掌握虚拟语气的用法，并提高在语言表达中正确运用虚拟语气的能力。
下面提供一些虚拟语气练习题及答案，希望可以帮助大家加深对虚拟语气的认识。
练习题一：填空题根据句意，选择正确的虚拟语气形式填空。
1. 如果我______（知道）你的电话号码，我会给你打电话。
答案：知道2. 如果我______（是）你，我会接受这个机会。
答案：是3. 如果他______（尽力）的话，他会取得更好的成绩。
答案：尽力4. 如果我______（有）足够的钱，我会帮助他。
答案：有5. 如果我______（做）得更好一些，我就能拿到这个工作了。
答案：做6. 如果明天______（不下雨），我们可以去野餐。
答案：不下雨7. 如果他______（不是）这么懒，他就不会被开除了。
答案：不是8. 如果你______（去）采取行动，你将失去这个机会。
答案：去9. 如果他______（读）更多的书，他的知识会更丰富。
答案：读10. 如果我______（拥有）魔法，我将会改变世界。
答案：拥有练习题二：选择题选择最佳答案填空。
1. 如果我______（会）弹钢琴，我会给你弹一首歌。
a. 会b. 能c. 可以d. 有答案：a. 会2. 如果你______（是）我，你会怎么做？a. 是b. 是的c. 如果d. 可以答案：a. 是3. 如果明天______（没有）下雨，我们可以去郊游。
a. 没有b. 不下c. 不下雨d. 不来答案：c. 不下雨4. 如果他______（学习）更努力，他会取得更好的成绩。
a. 学习b. 学习了c. 学习过d. 学习到答案：a. 学习5. 如果我______（有）足够的钱，我会买一辆新车。
a. 有b. 拥有c. 会有d. 有着答案：a. 有练习题三：改错题找出下列句子中的错误，并进行改正。
(完整word版)英语虚拟语气练习题及答案(2)
虚拟语气练习题用所给动词的适当形式填空：Part A.1.If people ______（drive) more slowly， there wouldn't be so many accidents.2.If you had worked carefully， you _____（not make） so many mistakes。
3.The boat wouldn’t have drifted away， if we _____ （tie) it up。
4.If I had known you already _____(have) a typewriter, I _____(not， buy） one for your birthday。
5.If he _____(be） here this afternoon I would go with him.6.If it were to rain tomorrow, the match _____(postpone）.7.But for your help, we ______(not be) able to finish the work in time。
8.If it _____(not， be） for the leadership of the Party， we would not have achieved so much.9.I wish I _____(study） hard while I was young.10.It is about time that fence ______（mend)。
11.My request is that we ______（hold） another session to discuss the problem.12.It is strange that the car _____(break) down at exactly the same place where it _____（break) down yesterday。
最新2023-2023年高考英语语法之虚拟语气精选练习题(附答案)Word版
谨严而节述叙文比号符、言语学数用使量时答非略省理合许允但丢骤键关给步按标分评考高记牢水带泥拖不范规速扼明简写书后法方到找多可尽得获从能才地致细有只楚清看句字逐定一以所源息信的道这解破是就身本目。
准手下快做，慢要题审虚拟语气(附参考答案)单项填空 [限时答题，时间30min]1. I don’t think that I shall fail. But if I____, I would try again.A. should failB. would failC. was to failD. had failed 2. ____she a man, she might be elected president.A. If wereB. WereC. Be D Is3. It was strange that we ____short of water in the country where it was always raining.A. I’m decidingB. I’ll decideC. I’d decidedD. I decided 5. My order is that everyone _____his work.A. were bornB. had been bornC. would have been bornD. was born 7. If I had studied English last year, I ____ able to speak it now.A. could beB. would have beenC. should beD. could have been8. It was not ____ she took off her dark glasses _____ I realized she was a famous film star.A. when, thatB. until, thatC. until, whenD. when, than 9. ----____is _____we’ll have the meeting? ----In the meeting room, I suppose.A. It, where thatB. Where, it thatC. Where, thatD. It, where there 10. It’s ____, not you, who want more.A. IB. meC. mineD. myself11. It ____Mike and Mary who helped the old man several days ago.A. areB. wasC. wereD. had been 12. Not only ____working hard, but also ____very polite.A. the girl is, she is B is the girl, she is C. the girl is, is she D. is the girl, is she 13. ----You seem to be an actor.----____. I have played many parts in a lot of films.A. So do IB. So am IC. So do ID. So I am 14. _____that we all went out, lying in the sun.A. So fine was the weatherB. So was the find weatherC. The weather was so fine wasD. So the weather was fine 15.Snowing hard outside, ____?A. doesn’t itB. isn’t itC. does itD. is it16. Only by practicing a few hours every day ____be able to master the language. A. you can B. will you C. you will D. canyou 17. ---Why not take my car to the museum instead of walking? ---No, thanks. _____.A. I’m used toB. I’m able toC. I’m about toD. I’vegot to18. Amy lost her money and Mother wasn’t surprised tha t she ____as she was too careless. A. did that B. did it C. did this D. did so。
虚拟语气练习含答案
虚拟语气练习1. If my lawyer _______ here last Saturday，he _______ me from going.A. had been；would have preventedB. had been；would preventC. were；would preventD. were；would have prevented解析：A．本题考查虚拟语气。
因为从句表示与过去事实相反的假设，故从句谓语动词用过去完成时，而主句谓语动词用would have +过去分词形式。
2. If I had worn my overcoat，I _______cold.A. won’t have caught B couldn’t have caughtC. won’t catchD. wouldn’t catch解析：B．本题考查虚拟条件句中主句谓语动词的使用。
因为从句用了过去完成时，可知主句谓语动词用would / could have +过去分词形式。
根据句意，可知选B.3.—If he ______ ，he ______ that food.—Luckily he was sent to the hospital immediately.A. was warned；would not takeB. had been warned；would not have takenC. would be warned；had not takenD. would have been warned；had not taken 解析：B. 根据答语，可知本题考查与过去事实相反的虚拟语气。
故从句谓语动词用过去完成时，而主句谓语动词用would have +过去分词形式。
4. I didn’t see your sister at the meeting. If she _______，she would have met my brother.A.has comeB. did comeC. cameD. had come解析：D．根据句意“在会上我没有看到你的姐姐。
虚拟语气练习题及答案
虚拟语气练习题及答案虚拟语气是汉语中的一种语法现象，用于表示虚拟或假设的情况。
它在表达条件、愿望、建议、命令等方面起着重要的作用。
在学习虚拟语气时，我们需要掌握一些常见的用法和结构。
下面将通过一些练习题来帮助大家巩固对虚拟语气的理解。
1. 如果我是你，我会怎么做？答案：如果我是你，我会怎么做。
2. 要是他来了，我们就去看电影。
答案：要是他来了，我们就去看电影。
3. 要是我有更多的时间，我就会去旅行。
答案：要是我有更多的时间，我就会去旅行。
4. 要是你早点告诉我，我就不会误解了。
答案：要是你早点告诉我，我就不会误解了。
5. 要是明天下雨，我们就取消计划。
答案：要是明天下雨，我们就取消计划。
6. 如果我有钱，我就买一辆新车。
答案：如果我有钱，我就买一辆新车。
7. 如果你不忙的话，我们可以一起去看电影。
答案：如果你不忙的话，我们可以一起去看电影。
8. 如果他努力学习，他就能考上大学。
答案：如果他努力学习，他就能考上大学。
9. 如果我是你，我会尽快解决这个问题。
答案：如果我是你，我会尽快解决这个问题。
10. 如果我有机会，我会去世界各地旅行。
答案：如果我有机会，我会去世界各地旅行。
通过以上练习题，我们可以看出虚拟语气在表示假设、条件和愿望等方面的灵活运用。
在实际应用中，我们可以根据具体的语境来选择使用虚拟语气，以达到更准确地表达自己的意思。
虚拟语气的学习需要不断的练习和积累，通过大量的阅读和写作，我们可以逐渐熟悉并掌握虚拟语气的用法。
同时，我们还可以结合语法书籍和教材进行系统学习，加深对虚拟语气的理解和运用。
总之，虚拟语气是汉语中一种重要的语法现象，掌握好虚拟语气的用法对于提高语言表达能力非常有帮助。
希望通过以上的练习题和答案，大家能够更好地理解和应用虚拟语气，提升自己的语言水平。
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虚拟语气(Subjunctive Mood)这一语法项目是各类英语考试中心测试的重点之一。
虚拟语气是一种特殊的动词形式，用来表示说话人所说的话并不是事实，而是一种假设、愿望、怀疑或推测。
判断是真实条件句还是非真实条件句。
只有在非真实条件句中才使用虚拟语气。
通过句子意思，看假设的条件是否能够实现，能够实现是真实条件句，不能使用虚拟语气；假设的条件不能实现则是非真实条件句，要用虚拟语气.判断这个假设是与哪个事实相反。
通常有三种情况：①与过去事实相反。
②与现在事实相反。
③与将来事实可能相反I: 最基本的虚拟语气句型:1. 虚拟现在时表示与现在事实相反的假设，其if 从句的谓语形式用动词的过去式(be 一般用were)，主句用would/ should/ could/ might +动词原形。
If places were a like, there would be little need for geographers.如果各个地方都一样，就不需要地理学家了。
2. 虚拟过去时是表示与过去事实相反的假设，if 从句的谓语形式用过去完成时即had＋过去分词，主句用would / should / could / might + have +过去分词。
If he had known your address yesterday, he would have telephoned you.3. 虚拟将来时是表示对将来实现的可能性很小的或不确定的假设。
If从句的谓语形式用一般过去式或用were to / should +动词原形，主句用would / should/could/ might +动词原形。
If he were to leave today, he would get there by Friday4. 省略if 采用倒装语序的条件句。
有时可以把含有助动词、情态动词、be或have的虚拟条件句中的连词if 省去，而将had , should, were 等词提到主语之前，即用倒装结构。
Had he worked harder, he would have got through the exams.Were he to leave today, he would get there by Friday.Were I in your place, I wouldn't do that5. 有时虚拟条件句并没来if 从句表示出来，而是用介词短语(otherwise, or, without, but for)、上下文或其它方式来表示。
We didn't know his telephone number; otherwise we would have telephoned him.Without you help, I wouldn't have achieved so much.But for your help, I would not have succeeded.II: 虚拟语气在从句中用should的情况:1. 在建议,要求,命令,想法后的动词后的从句里, 用should + 动词原形, should 可以省略. 如advise, agree, command, decide, demand, determine, grant, indicate, insist, order, prefer, propose, request, require, stipulate, suggest, urge, vote. 常考到的是: suggest, advise, demand, require, propose, insist, order, request.His doctor suggested that he (should) take short leave of absence.The author proposed that TV (should) be turned off at least one hour every day.2. 在建议,要求,命令,想法后的名词后的从句里, 用should + 动词原形, should可以省略. 如advice, agreement, command, decision, decree, demand, determination, indication, insistence, order, preference, proposal, request, requirement, stipulation etc.It was Bill's suggestion that everyone (should) have a map.His suggestion was that everyone (should) have a map.He gave us a suggestion that everyone (should) have a map.3. 在It is/was +形容词后的that 从句中用should的结构, should 可以省略. 这类形容词常见的有: advisable, anxious, compulsory, crucial, desirable, eager, essential, fitting, imperative(绝对必要), impossible, improper, important, natural, necessary, obligatory, possible, preferable, probable, recommended, urgent, vital etc.It‘s natural that she (should) do so.It is essential that we (should) tell her the news.4. 在lest 和for fear that( 以免) , in case (以防)从句中用should, should 可以省略.She walked quietly lest she (should) wake up her roommates.Have your gun ready in case we should need it.III: wish 后的that 从句中:1. 表示现在或将来的愿望,从句中过去式.I wish I knew his address.I wish I were young.2. 表示过去没有实现或不可能实现的愿望, 从句用过去完成式或would, could, might + have + 过去分词.I wish you had written to him.I wish I could have slept longer this morning, but I had to get up and come to class.3. 如果将wish改成wished, 其后that 从句中的动词形式不变.4. 如果that 从句中用would , 一般表示对现状不满或希望未来有所改变或请求I wish he would answer my letter.I wish prices would come down.I wish you would help me.I wish you would stop asking silly questions.IV: 在It's about/ high/ first(second, third etc) time 后的that 从句中, 用过去式. 表示“该是做什么的时候了”It is about time you were in bed.It is high time we left.It is the first time I came here.V: 在would rather, would sooner, would just as soon 后的that从句中, 用过去式或过去完成式, 表示”宁愿做什么”I would rather he came tomorrow than today.John would rather that she had not gone to the party yesterday evening.VI: 在if only 感叹句中, 谓语动词与wish宾语从句的虚拟形式相同.If only he didn't drive so fast! (现在)If only she had asked someone's advice.(过去)If only the rain would stop.(将来)VII: 在as if / as though 从句中, 表示和现在事实相反或对现在情况有所怀疑, 用过去式; 表示过去想象中的动作或情况, 用过去完成式.He speaks as if he were on the spot.She spoke to me as if I were deaf.This device operated as though it had been repaired.注: 1. 在as if / as though 句中, 如果有可能成为事实,用陈述语气.He looks as if he is going to be ill.2. 在insist 后的从句中, 如果是坚持自己, 用陈述语气, 坚持别人做什么事情, 用虚拟语气.she insists that she is right.she insisted that I should finish the work at once.错综时间的虚拟句通常情况下,在非真实条件句中主句和从句的谓语动词所指时间是一致的, 但有时也可能指不同的时间,这时要根据上下文的意思采用不同的谓语动词形式.If I were you, I would have taken his advice. (从句指现在, 主句指过去)。
换成我是你，我就会听从他的建议。
If I had taken my raincoat with me this morning, I would not be wet now. (从句指过去,主句指现在)。
如果我今天早上带了雨衣，现在就不会被淋湿了。
If we hadn’t been working hard in the past few years, things wouldn’t be going so smoothly.（从句指过去，主句指现在）。