虚拟语气虚拟条件句就是对现实条件的一种虚拟假设，所假设的条件一般不符合事实或与事实相反或在现实中发生的可能性极小。
根据时间的不同，虚拟条件句可分为三种，即与现在事实相反的虚拟条件句、与过去事实相反的虚拟条件句及与将来事实相反的虚拟条件句。
具体情例句：（1）表示与现在事实相反If I had enough money now, I would lend it to you.（2）表示与过去事实相反If he had taken your advice, he wouldn’t have made such a bad mistake.（3）表示与将来事实相反I would go shopping with you if it were to be Sunday tomorrow.1. 虚拟条件句的倒装在虚拟条件句中，为了强调所假设条件的虚拟性，或突出说话人的一种主观愿望，虚拟条件句可用倒装结构。
虚拟条件句的倒装是通过去掉if，把条件从句谓语中的助动词、情态动词或系动词放在句首实现的。
例如：Had I been（= If I had been ）in that situation，I would not have let the thief escape away with so much money.Should there be （= If there should be） a drought，what should we do at that time ？2. 错综时间条件句有时条件从句的动作和主句的动作发生的时间并不一致，这时谓语动词的形式应根据它所要表示的具体时间来确定。
例如：If we hadn’t been working hard in the past few years ，things wouldn’t be going so smoothly.3. 含蓄条件句有时假设的情况并不以条件从句的形式表现出来，而是通过某个介词或介词短语（如：with，otherwise，without，but for，in that position）、上下文或其它方式表现出来。
这种句子称为含蓄条件句。
例如：But for the help from you ，I would not have had the chance to go to college.二、虚拟语气在某些从句中的运用在某些词或短语后接的从句中要使用虚拟语气，表示愿望、建议或命令等。
根据虚拟语气的形式不同，虚拟语气可以分为“should类”和“过去时态类”。
（一）should类这一类的虚拟语气是通过从句中的谓语动词使用“should +动词原形”体现出来的，should 可以省略。
其具体运用体现在：1. 在suggest ，order，demand ，propose，command，request，desire，insist等表示建议、命令、要求、意见的动词后接的宾语从句中要使用虚拟语气。
如：He suggests that she should leave the house at once.The leader ordered that the task（should）be finished as soon as possible.He proposed that we （should）deal with the problem by the view of development.2. 与suggest，order，demand，propose，command，request，desire，insist等动词相对应的名词suggestion，order，demand，proposal等后的表语从句或同位语从句中要使用虚拟语气。
如：The general sent the order that the battle（should）be held on until the complete failure ofthe enemy.My proposal is that we（should）set a deadline for handing in the plan.3. 在It is/was suggested （ordered，demanded，proposed，etc.）结构以及necessary，essential，important，strange，natural等形容词后的主语从句中要使用虚拟语气。
如：It’s requested that we （should）keep the stability of the society for the people’s peaceful life.It is necessary that the badly wounded man（should）be treated immediately.（二）过去时态类英语中，还有一些词或短语后接的从句或句子，也要使用虚拟语气，虚拟语气是通过句中的谓语使用过去的某种时态（如：一般过去时、过去完成时等）来体现的。
1. wish，would rather 后的宾语从句。
如：He wished he had never been involved in such affairs.I would rather you could teach me again.2. as if，as though引导的从句。
如：The little boy knows so many things as if he was a man.He acted as usual as though nothing had happened.3. 由if only （要是……，那该多好啊！）引导的惊叹句。
如：If only I had passed the test！If only it stopped raining！4. It is（about/high）time 后的定语从句。
如：It is time we went out for a walk.It was high time they had begun to prepare the experiment.三、虚拟语气的其它用法在英语中，一些表示建议、请求、劝告、愿望、祈祷、祝福或诅咒的句子，也需要使用虚拟语气。
如：Would you mind smoking here？May you be lucky！Long live the people of China！God save me.高中英语虚拟语气练习题二．选择题1. If only he ____quietly as the doctor instructed, he would not suffer so much now.A. liesB. layC. had lainD. should lie2. How I wish every family ____a large house with a beautiful garden.A. hasB. hadC. will haveD. had had3. You did not let me drive. If we ____in turn, you ____ so tiredA. drove; didn’t getB. drove; wouldn’t getC. were driving; wouldn’t getD. had driven ; wouldn’t have got4. _____it rain tomorrow, we would have to put off the visit to the Yangpu BridgeA. WereB. ShouldC. WouldD. Will5. I suggested the person _____ to be put into prisonA. refersB. referringC. referredD. refer6. When a pencil is partly in a glass of water, it looks as if it____A. breaksB. has brokenC. were brokenD. had been broken7. I insisted _____to see a doctor, but he insisted nothing ___ wrong with himA. on him to go; should beB. he went; beC. he go; wasD. he should to; is8. ---Your aunt invites you to the movies today---I had rather she ____ me tomorrow than todayA. tellsB. toldC. would tellD. had told9. ---Would you have called her up had it been possible---Yes, but I ____busy doing my homeworkA. wasB. wereC. had beenD. would be10. I was ill that day, otherwise I ____ the sports meetA. would have taken part inB. took part inC. had taken part inD. would take part in11. ___the clouds, you would find the airplane in the sky easilyA. Had it not been forB. If it were notC. If it had not been forD. Were it not for12. If my lawyer ____here last Sunday, he ____ me from goingA. had been, would have preventedB. had been, would preventC. were, preventD. were, would have prevented13. ____hard, he would have passed the examA. If he were to workB. Had he workedC. Should he workD. Were he to work14. ____today, he would get there by FridayA. Were he to leaveB. If he had leftC. Did he to leaveD. Had he left15. Had you listened to the doctor, you ____all right nowA. areB. wereC. would beD. would have been16. I did not see your sister at the meeting. If she ____, she would have met my brotherA. has comeB. did comeC. comeD. had come17. He ____busy yesterday, or he ___you with your experiment.A. was, had helpedB. was, would have helpedC. had been, would have helpedD. were, would have helped18. If it ____for the snow, we____ the mountain yesterdayA. were not, could have climbB. were not, could climbC. had not been, could have climbedD. hadn’t been, could climb19. Without electricity, human life ____quite difficult todayA. isB. will beC. would have beenD. would be20. ---I am going to tell her the news---I would as soon you _____her about itA. didn’t tellB. don’t tellC. hadn’t tellD. won’t tell21. Mike’s father, as well as his mother, insisted he ____homeA. stayedB. could stayC. has stayedD. stay22. It was requested that the play ____againA. should put onB. would put onC. be put onD. put on23. She insisted that a doctor _____ immediatelyA. had sent forB. sendC. be sent forD. was sent24. ---Did you scold him for his carelessness----Yes, but ____itA. I’d rather not doB. I’d rather not have doneC. I should’ t doD. I’d better not do25. If only I ___my carA. hadn’t lostB. wouldn’t loseC. didn’t loseD. haven’t lost26. But for water, it ____impossible to live in the earthA. isB. wouldC. wereD. wouldn’t be27. I would rather you ____anything about it for the time beingA. doB. didn’t doC. don’tD. didn’t28. The kind-hearted couple treat the orphan very well as though he ____ their own sonA. isB. wereC. had beenD. should be29. How the old people wish that they ____young once moreA. wereB. could becomeC. had beenD. should be30. It is high time that we ____ a meeting to discuss this problemA. holdB. heldC. have heldD. had held31. The thief closed his eyes ____ he ____dyingA. even if , wasB. though, would beC. even, had beenD. as if, were32. I wish that you ____ such a bad headache because I am sure that you would have enjoyed the concertA. had notB. did not have hadC. hadn’t hadD. hadn’t have33. The chairman insisted that we ____the question againA. will discussB. to discussC. should discussD. will be discussed34. He requested that the students ____them get in cropsA. helpB. to helpC. helpedD. helping35. The guard at the gate insisted that everybody _____the rulesA. obeysB. ObeyC. will obeyD. would obey36. I wish I ____here thenA. wasB. had beenC. wereD. would be37. It is strange that he ____back so earlyA. cameB. will comeC. had comeD. should have come38. Mother suggested that I ___my homework first before watching TVA. didB. doC. shall doD. have done39. My suggestion is that the meeting ____off till nest SundayA. be putB. putC. should putD. had been put40. He is talking so much about America as if he ____ thereA. had beenB. has beenC. wasD. been41. The teacher demanded that the exam _____ before elevenA. must finishB. would be finishedC. be finishedD. must be finishedC BD B C C C B A A D A B A C D B C D AD C C B A C B B A B D C C A B B D B A AC D C B C D D B C D B B A A A C D C。
