●Grammar and UsageStep 1: General introductionThis section teaches four other cases that need to use unreal conditionals. You’ll learn the forms of mixed unreal conditionals, words that can replace if-clauses in implied conditionals and the usage of wish or would rather in unreal conditionals.Step 2: RevisionAs we learned in the last unit, when a sentence is talking about something that is not real or currently impossible, the verb will be used in a special form that expresses a wish, possibility, condition, etc.Step 3: Explanation and practice1. We should first pay attention to the forms of the predicate verbs in different tenses when we use sentences in unreal conditional. Let’s remember how to form unreal conditionals of the present,e.g. 1) If you had come and attended the meeting yesterday, you would know what we are doing now.2) If you had followed my advice, you would not be in trouble now.Now, complete Part A. Pay attention to the different tenses in the if-clause and the main3. Read Point 2. Sometimes we can use otherwise, or and phrases beginning with with, without and but for to replaces a if-clause in implied conditionals. Pay attention to the verb form in the main clauses.4.In adverbial clauses introduced by even if, as if, as though and if only we can use unreal conditionals.In object clauses after wish or would rather the subjunctive verb forms are often used because the speaker thinks what is said in the clause is currently not true or possible, or will not happen. You should know different subjunctive verb forms are used in the object clause according to the time that the event happened or will happen.e.g. 1) I wish you had met him yesterday.2) Without your help , we couldn’t have made such progress in my study in the past few years .3) If only you hadn’t told him what I said! Everything would have been all right.4) Without electronic computers, much of today's advanced technology couldn’t have been achieved.5. Read the dialogue in Part B and fill in each blank with a proper word or phrase according to theStep 4: ConsolidationI. Multiple choice1. We demanded that we __________ of any change in the plan.A. informedB. would be informedC. be informedD. had been informed2. It’s necessary that he _________ a recognized qualification.A. hasB. haveC. hadD. having3. It's high time we ____________ our attention to this problem.A. turnedB. turnC. had turnedD. would turn4. If only you __________ him what I said! Everything would have been all right.A. didn't toldB. hadn't toldC. would not tellD. would have not told5. He must have had an accident, or he____________ here then.A. would have beenB. had beenC. should have beenD. could be6. Much labour would have been saved if the electronic computers_____________ before.A. had inventedB. were inventedC. should have been inventedD. had been invented7. _____________ cease advertising, prices would be significantly reduced.A. Were they toB. Could theyC. If theyD. Would they8. Five minutes earlier, and we ____________ the last bus.A. had caughtB. should have caughtC. could have caughtD. caught9. You ____________ the clothes! We have a washerwoman to do that sort of thing.A. shouldn't have washedB. mustn't have washedC. can not have washedD. needn't have washed10. Jean doesn't want to work right away because she thinks that if she _________ a job sheprobably wouldn't be able to see her friends very often.A. has to getB. were to getC. had gotD. could have got11. The mad man was put in the soft-padded cell lest he _____________ himself.A. injureB. had injuredC. injuredD. would injure12. It is politely requested by the hotel management that radios __________ after 11 o'clock atnight.A. were not playedB. not to playC. not be playedD. did not play13. You don't have to be in such a hurry. I would rather you _________ on business first.A. would goB. will goC. wentD. have gone14. It is important that enough money ___________ to fund the project.A. be collectedB. must be collectedC. was collectedD. can be collected15. If only the committee __________ the regulations and put them into effect as soon as possible.A. approveB. will approveC. can approveD. would approve16. I don't think it advisable that Tom ________ to the job since he has no experience.A. is assignedB. will be assignedC. be assignedD. has been assigned17. You _________ her in her office last Friday; she's been out of town for two weeks.A. needn't have seenB. must have seenC. might have seenD. can't have seen18. We didn't know his telephone number, otherwise we _________ him.A. would have telephonedB. must have telephonedC. would telephoneD. had telephoned19. It is recommended that the project _________ until all the preparations have been made.A. is not startedB. will not be startedC. not be startedD. is not to be started20. I wish I ________ longer this morning, but I had to get up and come to class.A. could have sleptB. sleptC. might have sleptD. have slept21. I ________ her to the party but I didn't know her well.A. ought have invitedB. would have invitedC. should inviteD. may have invited22. You ________ to town to see the film last week. It will be on TV tomorrow.A. needn't goB. should not goC. had better not goD. needn't have gone23. --- Would you have called her up had it been possible?---- Yes, but I ________ busy doing my homework..A. wasB. wereC. had beenD. would be24. It was essential that the application forms ___________ back before the deadlineA. must be sentB. would be sentC. be sentD. were sent25. It is important that we ________.A. shall close the window before we leaveB. will close the window before we leaveC. must close the window before we leaveD. close the window before we leaveII. Translation1. 我不知道他的电话号码，否则我就打电话给他了。