虚拟语气课件范文
虚拟语气公开课全PPT课件
将来虚拟语气
总结词
表示与将来事实相反的情况
详细描述
在从句中使用一般过去时或 “were to+动词原形”，主句中 使用“would+动词原形”，表示 与将来实际情况相反的情况，常 用于表达预测、期望等情感。
混合虚拟语气
总结词
表示与过去、现在或将来事实相反的 情况
详细描述
在从句和主句中分别使用不同的时间 点的虚拟语气形式，表示与过去、现 在或将来实际情况相反的情况，常用 于表达复杂的假设、期望等情感。
在定语从句和主句中的用法
在定语从句和主句中，虚拟语气也有特定的用法。在 定语从句中，虚拟语气通常用于修饰名词或代词，表 达对某种情况的假设或想象。
例如，“I have a dream that one day this nation will rise up and live out the true meaning of its creed: 'We hold these truths to be self-evident: that all men are created equal.'”（我有一个梦想 ，有一天这个国家会站起来并实现其信条的真正含义 ：我们认为这些真理是不言而喻的：所有的人生来平 等。）在主句中，虚拟语气通常用于表达对某种情况 的祝愿或假设。
02
在省略句中，虚拟语气通常出现在被省略的部分，表示与实际情况相反的情况 或结果。
03
例如，“If he had known the answer, he would have told you.”这句话省 略了“he had known the answer”的部分，只保留了关键信息“he would have told you”，表示“如果他知道了答案，他会告诉你的”。
虚拟语气公开课全PPT课件
04
虚拟语气的实际应用
在写作中的应用
写作中，虚拟语气可以用来表达假设 、条件、建议、意愿等，使句子更加 生动、有力。例如，“如果我是你， 我会选择这个选项。”
在翻译中的应用
在翻译过程中，虚拟语气可以用来保持原文的语气和情感色彩，使译文更加准确、传神。例如，在翻 译英文的虚拟语气时，可以将其翻译为中文的“要是”、“如果”、“假如”等词，以保持原文的语 气和含义。
虚拟语气在翻译中还可以用来处理一些难以理解的句子或表达方式，使其更加符合目标语言的习惯和 表达方式。例如，在翻译一些复杂的从句或长句时，可以使用虚拟语气来简化句式或突出重点。
虚拟语气公开课全ppt 课件
汇报人：可编辑
2023-12-23
目录 CONTENT
• 虚拟语气概述 • 虚拟语气的基本形式 • 虚拟语气的特殊形式 • 虚拟语气的实际应用 • 虚拟语气常见错误与纠正方法 • 虚拟语气练习与答案解析
01
虚拟语气概述
定义与特点
定义
虚拟语气是表示假设、想象、推 测等非真实情况的语气，常常用 于条件句、祝愿、建议等语境中 。
虚拟语气常见错误与纠 正方法
时态错误
总结词
时态错误是指虚拟语气在时态使用上的不准确，通常表现为混淆了虚拟语气与陈述语气 。
详细描述
在英语中，虚拟语气通常表示与事实相反的情况，如假设、想象、祝愿等，时态的使用 应与事实相反。例如，在"If I were you, I would do it"中，"were"和"would"构成了 虚拟语气，表示与事实相反的情况。如果混淆了虚拟语气和陈述语气，就会造成时态错
虚拟语气公开课全PPT课件(模板)
80%
例句
If I were you, I would study harder.（如果我是你，我会ቤተ መጻሕፍቲ ባይዱ努 力学习。）
过去时条件句虚拟语气
基本结构
If + 主语 + had + 过去分词， 主语 + would/should/could/might + have + 过去分词
03
情态动词的疑问句形 式错误
在构成疑问句时，应将情态动词放在 句首，而不是将助动词“do”放在句 首。例如，“你能来吗？”应表达为 “Can you come?”，而不是“Do you can come?”。
THANK YOU
感谢聆听
虚拟语气在从句中的运用技巧
名词性从句中虚拟语气使用规则
虚拟语气在主语从句中的应用
当主语从句表达的是与现在事实相反的情况时，谓语动词用一般过去时。
虚拟语气在宾语从句中的应用
当宾语从句表达的是与现在事实相反的情况时，谓语动词用一般过去时或过去完成时。
虚拟语气在表语从句和同位语从句中的应用
当这些从句表达的是与现在事实相反的情况时，谓语动词用一般过去时。
定语从句中虚拟语气使用规则
虚拟语气在定语从句中的应用：当定语从句表达的是与现在事实 相反的情况时，谓语动词用一般过去时或过去完成时。
需要注意的是，定语从句中的虚拟语气通常出现在“as if”或 “as though”引导的从句中。
状语从句中虚拟语气使用规则
虚拟语气在条件状语从句中的应用
当条件状语从句表达的是与现在事实相反的情况时，谓语动词用一般过去时或过去完成 时。
虚拟语气公开课全PPT课件
将来虚拟语气
表示与将来事实相反的情 况，动词形式为 “would/should/could/ might + 动词原形”。
虚拟语气的时间状语
1 2
与过去事实相反的时间状语
如“if only I had known”、“if only I had done”等。
与现在事实相反的时间状语
如“if only I were”、“if only I did”等。
定义
虚拟语气是一种表达者通过想象 或假设的情境来表达情感、态度 或观点的语法形式。
特点
虚拟语气通常使用特殊的动词形 式，如“如果”、“假如”、“ 可能”等，来表达与现实相反或 不可能发生的情境。
虚拟语气的起源与发展
起源
虚拟语气起源于古希腊和古罗马的文 学作品中，用于表达作者对虚构世界 的想象和描述。
条件状语从句
If I had time now, I would read the book.
主句
I would go to the park today.
虚拟语气的形式
01
02
03
虚拟过去时
与过去事实相反或不可能 发生
条件状语从句
If I had known your phone number then, I would have called you.
虚拟语气在书面语中的技巧与策略
根据语境和表达意图选择适当的 虚拟语气形式。
注意使用情态动词的过去式和过 去完成式时态。
掌握虚拟语气的特殊用法，如用 在if条件句中。
虚拟语气在书面语中的注意事项
避免混淆真实条件句和虚拟条件句。
掌握虚拟语气的特殊用法和变体形式 。
注意虚拟语气的正确使用场合和适用 范围。
虚拟语气课件(优秀8篇)
虚拟语气课件（优秀8篇）虚拟语气教案设计篇一一、语气的种类：英语句子中谓语动词的语气有四种：1.直陈语气(The Indicative Mood)直陈语气用于直截了当地陈述事实、描述状态：e.g.He has published quite anumber of essays this year.他今年已发表了好几篇论文。
2.祈使语气(The Imperative Mood)祈使语气用于提出请求、命令、建议或是劝告等：e.g.Wait outside until you are asked.请在外面等候，请你进再进去。
Let's just take abreak,shall we?我们休息一会儿，好吗？3.疑问语气(the interrogative mood)：用来提出问题e.g.Where are from?4.虚拟语气(The Subjunctive Mood)虚拟语气用于表示主观愿望和假设的虚拟情况。
虚拟语气不太顾及事实的存在，它表现出说话人的主观因素比较多。
所以说话人所讲的内容往往是与事实相反的；或是其实现的可能性微乎其微，甚至于没有实现的可能性。
当然，有时为了使说话的语气客气、缓和、委婉，也使用虚拟语气。
e.g.I wish you were more careful.但愿你更细心一些。
If Ihad more money,I would buy abigger apartment.我要是有再多一点钱，我就买一套更大一些房子。
Would you mind shutting the door?劳驾您把门关上。
二、虚拟语气的种类：虚拟语气用来表示说话人的主观愿望或假想，所说的是一个条件，不一定是事实，或与事实相反。
虚拟语气在条件句中应用比较多；条件句可分为两类，一类为真实条件句，一类为非真实条件句。
非真实条件句表示的是假设的或实际可能性不大的情况，故采用虚拟语气。
三、真实性条件句真实条件句用于陈述语气，假设的。
2025届高考英语虚拟语气知识点总结+课件
Homework
1. 完成高考汇编关于虚拟语气的练习题； 2. 用虚拟语气完成小诗。小诗的首句已给出。
If I were a bird, I would fly into the sky. ......
Thanks
为什么不用If I am a boy? 为什么不用If I was a boy?
虚拟语气是由句中的谓语动词的特殊形式表示出来的。
动词语气
1、虚拟语气：虚拟语气表示说话人的主观愿望、猜疑、建议或与事实不符 的假设等，而不表示客观存在的事实。 2、虚拟语气是由句中的谓语动词的特殊形式表示出来的。
你会辨认虚拟语气了吗？
对现在的虚拟条件从句
If there were no subjunctive(虚拟语气), English would be much easier.
从句
主句
If + 主语 + 过去式（were），主语 + should/would/could/might + 动词原形
来练一练
1. If there ____w__e_r_e____ (be) no air or water，there ____w_o_u__ld__b_e_____no living things on the earth.
如果我是个男孩 我想我能够明白 爱一个女孩是什么样的滋味 我发誓我会是一个好男人 我会倾听她， 因为我了解
When you loose the one you wanted 失去了你爱的人那有多痛苦
Cause he’s taken you for granted
因为他把你视作理所当然
And everything you had got destroyed! 你的一切都被毁
虚拟语气(经典课件)
从句用过去完成时，主句用 would/should/could/might+have done。如：If you had come earlier, you would have met him.
与将来事实相反
从句用一般过去时/were to do/should do，主句用 would/should/could/might+动词原形。如：If it rained tomorrow, we would stay at home.
PART 01
虚拟语气概述
定义与特点
01
虚拟语气是一种特殊的动词形式 ，用于表示与实际情况相反的假 设、愿望、建议等。
02
虚拟语气的主要特点是通过改变 动词的形式来传达一种非真实或 假设的语气。
虚拟语气的作用
表达与事实相反的假设
通过虚拟语气，可以表达与现实情况 不符的假设条件，从而探讨可能的结 果或情况。
PART 05
虚拟语气与其他语法的综 合应用
虚拟语气与情态动词的综合应用
情态动词+have done
表示对过去事情的推测，或表达说话人的主观意愿和态度。如：Must have done表示对过去事 情的肯定推测。
情态动词+have been doing
表示对过去正在进行的动作的推测，或表达说话人的某种情绪。如：Should have been working表示本应该一直在工作。
WENKU DESIGN
WENKU DESIGN
2023-2026
ONE
KEEP VIEW
虚拟语气(经典课件)
WENKU DESIGN
WENKU DESIGN
虚拟语气课件优秀9篇
虚拟语气课件优秀9篇关于虚拟语气篇一1．Were it not for the snowy weather, we all right.A. would beB. would have beenC. wereD. may be2. more careful, his ship would not have sunk.A. If the captain wereB. Had the captain beenC. Should the captain beD. If the captain would have been3. If he me tomorrow, I would let him know.A. should callB. should not have been ableC. were not ableD. are not able4. If you asked your father, you permission.A. may getB. might getC. should have calledD. maybe get5. today, he would get there by Friday.A. Would he leaveB. Was he leavingC. Were he to leaveD. If he leaves6. I you, I would go with him to the party.A. WasB. Had beenC. Will beD. Were7.The millions of calculations involved, had they been done by hand, all practical value by the time they were finished.A. could loseB. would have lostC. might loseD. ought to have lost8. Had Paul received six more votes in the last election, he our chairman now.A. must have beenB. would have beenC. wereD. would be9. If you Jerry Brown until recently, you’d think the photograph on the right was strange.A. shouldn’t contactB. didn’t contactC. weren’t to contactD. hadn’t contacted10. he English examination I would have gone to the concert last SundayA. In spite ofB. But forC. Because ofD. As for11. Look at the terrible situation I am in! If only I your adviceA. followB. would followC. had followedD. have followed12. Had Paul received six more votes in the last election, he our chairman now.A. must have beenB. would have beenC. wereD. hadn’t contacted一叁. If the horse won today, it thirty races in five years.A. would have wonB. wonC. must have wonD. did have won14. There is a real possibility that these animals could be frightened, a sudden loud noise.A. being thereB. should there beC. there wasD. there having been一⑦. I would have gone to visit him in the hospital, had it been at all possible, but I fully occupied the whole of last week.A. wereB. had beenC. have beenD. was18. I apologize if I you, but I assure you it was unintentional(无意的)l.A. offendB. had offendedC. should have offendedD. might have offended19. If you hadn’t taken such a long time to get dressed, we’d there by now.A. beB. circlesC. is circlingD. be circling20. The sun rises in the east and sets in the west, so it seems as if the sun round the earth.A. were circlingB. circlesC. is circlingD. be circling21. I wish that I with you last night.A. wentB. have goneC. could goD. could have gone22. I wish I with her.A. would beB. amC. wasD. were23. I wish that I the concert last night.A. couldB. have attendedC. could have attendedD. attended24. The picture exhibition bored me to death. I wish I to it.A. had not goneB. have not goneC. did not goD. can not have gone25. “I wish you me to put these things away,” he said.A. will helpB. helpC. are helpingD. would help26. If the Watergate Incident Nixon would not have resigned from the presidency.A. did not occurB. had not occurredC. was not occurringD. be circling27. I hadn’t expected James to apologize but I had hoped .A. him calling meB. that he would call meC. him to call meD. that he call mewould certainly have attended the meeting, .A. if he didn’t get a flat tireB. if the flat tire hadn’t happenedC. had he not had a flat tireD. had the tire not flattened itself29. The teacher suggested that her students experiences with ESP.A. write a composition on theirB. to write composition about theC. wrote some compositions of his or herD. had written any compositions for his30. He speaks Chinese as fluently as if he a Chinese.A. wereB. had beenC. isD. has been31. As usual, he put on a show as though his trip a great success.A. had beenB. has beenC. wereD. was32. Looking round the town, he felt as though he away for ages.A. has beenB. wasC. isD. had been33. John is so strongly built that he looks as if he as elephant.A. liftsB. is liftingC. liftedD. could lift34. He described the town as if he it himself.A. had seenB. has seenC. sawD. sees35. At that thought he shook himself, as though he from an evil dream.A. wokeB. wakesC. would wakeD. had woke36. Most insurance agents would rather you anything about collecting claims until they investigate the situation.A. doB. don’tC. didn’tD. didn’t do37. Although most adopted persons want the right to know who their natural parents are, some who have found them wish that they the experience of meeting.A. hadn’tB. didn’t have hadC. hadn’t hadD. hadn’t have38. It is important that the TOEFL office your registration.A. will confirmB. confirmC. confirmsD. must confirm39.Without electronic computers, much of today’s advanced technology .A. will not have been achievedB. have not been achievedC. would not have been achievedD. had not been achieved40. He speaks Chinese as fluently as if he a Chinese.A. wereB. had beenC. isD. has been 41. It is time that the government measures to protect the rare birds and animals.A. takesB. tookC. has takenD. taking42. Some people are too particular about school records, insisting that every applicant all diplomas from elementary school to university.A. hasB. will haveC. should haveD. must have43. He was very busy yesterday, otherwise he to the meeting.A. would comeB. cameC. would have comeD. had come44. I must say he reads very well, and I shouldn’t be surprised if he acting for a living one day.A. had taken upB. takes upC. have taken upD. would have taken up45. If I had seen the movie, I you all about it now.A. would tellB. will tellC. have toldD. would have told46. I hadn’t expected Henry to apologize but I had hoped .A. him to call me upB. him calling me upC. that he would call me upD. that he will call me47. I had hoped that John a year in Africa, but he stayed there only for three months.A. spendsB. spentC. would spendD. will spend48. I had hoped that Jennifer a doctor, but she wasn’t good enough at science.A. will becomeB. becameC. would becomeD. becomes49. I’d rather you anything about it for the time being.A. doB. didn’t doC. don’tD. didn’t50. I’d just as soon rudely to her.A. that you won’t speakB. you not speakingC. you not speakD. you didn’t speak51. It’s high time they this road.A. mendB. mendedC. must have mendedD. will mend52. It’s about time people notice of what women did during the war.A. takeB. tookC. have takenD. will take53. Everybody has arrived. It’s time we the class.A. shall startB. would startC. had startedD. start54. the English examination I would have gone to the concert last Sunday.A. In spite ofB. But forC. Because ofD. As for55. Mary my letter; otherwise she would have replied before now.A. has receivedB. ought to have receivedC. couldn’t have receivedD. shouldn’t have received56. John did not feel well yesterday; otherwise he to see his classmates off.A. cameB. would comeC. would have comeD. should be coming57. He’s working hard for fear that he .A. should fall behindB. fell behindC. may fall behindD. would fall behind58. Without the dreams of the youth, this invention might for a century.A. have been postponedB. has been postponedC. postponeD. be postponed59. In the past men generally preferred that their wives in the home.A. workedB. would workC. workD. were working60. For a child to give up his less mature idea for a more mature one, it requires that the child psychologically ready for the new idea.A. isB. wereC. beD. would be61. Tom’s father, as well as his mother, in New York for a few days more.A. ask him to stayB. ask he to stayC. asks he staysD. asks he stay62. Your advice that till next week is reasonable.A. she waitsB. she waitC. wait sheD. she waited64. It was essential that we lease before the end of the month.A. singB. singedC. had signedD. were signing65. It is appropriate that some time thorough study of the results of the Apollo mission.A. devotes toB. devoted toC. is devoted toD. be devoted to答案与详解1．A．条件句表示与现在事实相反的虚拟。
虚拟语气公开课全PPT课件
汇报人：可编辑 2023-12-23
目录
• 虚拟语气简介 • 虚拟语气的种类和形式 • 虚拟语气的时态 • 虚拟语气的用法 • 虚拟语气的特殊情况 • 虚拟语气在写作中的应用
01
虚拟语气简介
什么是虚拟语气
01
虚拟语气是英语语法中的一种表 达方式，用于表示假设、条件、 想象等情境中的动作或状态。
+ 动词原形。
第一人称复数形式
We would/could/might/should
+ 动词原形。
第三人称单数形式
He/She/It would/could/might/should
+ 动词原形。
第三人称复数形式
They would/could/might/should
+ 动词原形。
虚拟语气与陈述语气、祈使语气、疑问语气的比较
虚拟语气在现实生活中的应用
在日常交流中，虚拟语气可以用 于表达委婉的请求、建议或条件
，使语言更加柔和、礼貌。
在商业沟通中，虚拟语气可以用 于表达对客户的尊重、关心或提
供更好的服务。
在文学作品中，虚拟语气可以用 于描绘虚构的场景、情感或人物 心理状态，增强作品的感染力和
表现力。
02
虚拟语气的种类和形式
情态动词表示祝愿、请求、建议等意 义时，其后的从句常用虚拟语气，谓 语动词根据情况可用原形或完成式。
06
虚拟语气在写作中的应用
在议论文中的应用
总结词
增强论述说服力
详细描述
在议论文中使用虚拟语气，可以强调观点和论据，使论述更具说服力。例如， “假如没有教育，社会将停滞不前”，通过使用虚拟语气，强调了教育对社会 发展的重要性。
虚拟语气ppt课件完整版
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例子
Had you come earlier, you would have met him.（= If you had come earlier, you would have met him.）（如果你早点来，你就能 见到他了。）
例子
Should it rain tomorrow, we would stay at home.（= If it should rain tomorrow, we would stay at home.）（如果明天下雨，我们就 呆在家里。）
虚拟语气用于强调句时，通常是通过 “It was ... that”结构对句子中的特 定成分进行强调。
在这种结构中，虚拟语气的使用与普 通虚拟语气略有不同，需要根据具体 情况进行判断。
虚拟语气与其他语法结构搭配使用
虚拟语气可以与定语从句、状语从句等语法结构搭配使用，表达更为复杂的语义关 系。
在这些结构中，虚拟语气的使用需要根据具体的语境和表达的语义关系进行判断。
真实条件句
表达现实中可能实现的情况， 使用陈述语气。
例子
If you study hard, you will pass the exam.（如果你努力 学习，你会通过考试。）
非真实条件句
表达与事实相反或不太可能实 现的情况，使用虚拟语气。
例子
If I were you, I would not do that.（如果我是你，我不会那
状语从句中虚拟语气使用
在if条件状语从句中
如果条件状语从句所表示的内容与实际情况相反或实现的可能性很小，则从句中的谓语动词常用虚拟语气。
在其他状语从句中
除了if条件状语从句外，还有一些其他状语从句也可以用虚拟语气，如：in order that（为了）、so that（以便 ）等引导的目的状语从句中。这些从句中的谓语动词形式通常为“may/might/could/should + 动词原形”。
虚拟语气课件5篇
虚拟语气课件5篇教师在每节课之前都会提前制定教学课件，这是非常必要的。
每位教师都对编写教案课件非常熟悉。
为了进行课堂教学，教师必须依据教案课件来进行教学。
经过仔细筛选，在这里我为大家推荐一篇题为“虚拟语气课件”的文章，希望这些行业新闻能够帮助大家更好地了解该领域的最新动态！虚拟语气课件(篇1)Subjunctive Mood (虚拟语气)1.It is important that he __________ the college entrance examination.A. should attendB. will attendC. must attendD. had to attend8.Don’t come this morning. I would rather you________ the day after tomorrow.A. comeB. cameC.are to comeD. will come3._________ for the free tickets, I would not have gone to the film so often.A.If it is notB.Were it notC. had it not beenD. If they were not4.---Did you meet with the famous space hero YanLiwei?---________ I had come here earlier!A.But forB.If notC. For fearD. If only5.Without electricity human life __________ quite difficult today.A.isB.will beC. would have beenD.would be(分析： 1.A虚拟语气的一种，句式It is necessary/strange/important that …should do2.B 3.C had it not been=if it not had been 4. D. If only= I wish 要是… 该多好啊5.D) 虚拟语气课件(篇2)虚拟语气的主题：假设与可能性虚拟语气是表示假设、可能、愿望等情况的一种语气，它在英语写作中非常常见。
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虚拟语气课件范文
Ⅰ用以表示虚拟条件的虚拟语气
1. 用if条件从句表示的虚拟条件，是虚拟条件最普通的方式。
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，例如：If I were in your position I would marry her.
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，例如：If it had not rained so hard yesterday we could have played tennis.
③大多数的虚拟条件句属于上面三种情况的一种，但并不排除存在条件和后果中，一个和现在情况相反，另一个和过去情况相反，例如：If you had followed what the doctor said, you would not have been so painful now.这个句子在高中出现频率颇高。
④但是，如果后果用了虚拟语气，而条件却用陈述语气，这种用法是错的。
2. 除了表示虚假条件外，if从句还可以表示对将来的推测，由于是将来还没有发生的，所以谈不上是真实的还是虚假的，只能说这个事情发生的可能性有多大。
一般情况下，可以用陈述语气的if从句来表示对一个未来事实的推测，这个事实是完全可能发生的。
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，例如：Jean doesn't want to work right away because she thinks that if she were to get a job she probably wouldn't be able to see her friends very often.
4. 大多数的虚拟条件通过上面所讲的两种方法表达，但在个别句子中也可以通过介词without和介词短语but for表达，副词otherwise等表达出来。
例如：We didn't know his telephone number; otherwise we would have telephoned him.值得注意的是，包含but for的句子，谓语动词必定要用虚拟形式，但包含without等短语的句子，谓语动词未必一定要用虚拟语气。
5. 有时虚拟条件不是明确地表达出来，而在蕴含在用but引导的从句里，于是便出现了有谓语动词是虚拟语气的主句加上谓语动词是陈述语气的but从句构成的并列复合句，例如I would have hung you but the telephone was out of order.在这样的句子里，如果主句没有用虚拟语气，或者从句用了虚拟语气，都是错的。
Ⅱ用在宾语从句中的虚拟语气
1. 在表示愿望的动词wish后的宾语从句中，需用虚拟语气。
（wish后的that 常省略），根据主句时态，从句谓语时态相应退后一位，例如：How she wished his family could go with him.
除此之外，上述动词也要求用虚拟式
①在It is+上述动词的过去分词，其后所跟的主语从句中，如It is suggested that pupils wear school uniforms.
②在上述动词相应的名词形式作主语+连系动词，其后的表语从
句中，例如His suggestion was that classed be re-scheduled.
③在对上述动词相应的名词进行解释的同位语从句中，如：The workers raised the demand that their pay be increased to cope with the inflation.
3. would （had）rather , would sooner也用来表达主观愿望，它们之后的宾语从句中需用虚拟语气。
谓语动词用过去式表示现在或将来，用过去完成式表示与过去事实相反，例如：I would rather he went right now.
Ⅲ其他形式的虚拟语气
1. it is +necessary等形容词后，that主语从句中虚拟形式使用，这类形容词包括necessary, important, essential, imperative, urgent, preferable, vital, advisable等，例如It is necessary that you listen to the teacher carefully.或者It is essential that you be able to pronounce every single word correctly.
2. 在It's (high/about) time 之后的定语从句中需用虚拟语气。
谓语动词用过去式，例如It is high time that you went to school
3. 虚拟语气在as if / as though 引导的方式状语从句中的应
用（谓语动词形式与wish后的宾语从句基本相同）表示与现在事实
相反或对现在情况有怀疑，谓语动词用过去式。
例如：He felt as if he alone were responsible for what had happened. 表示过去想
象中的动作或情况，谓语动词用过去完成式。
4. 在lest 引导的状语从句中，谓语动词多用虚拟语气，(should )+ 动词原形。
例如： The mad man was put in the
soft-padded cell lest he injure himself.
5. 在if only 引起的感叹句中需用虚拟语气。
谓语动词用过去式或过去完成式。
例如： Look at the terrible situation I am in! if only I had followed your advice.
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内容仅供参考。