1、虚拟语气教案 if条件从句的谓语形式主句的谓语形式与现在事实相反If主语did（be用were）主语should/would/could/mightdo与过去事实相反If主语haddone主语should/would/could/mighthavedone与将来事实相反If主语did（be用were）shoulddoweretodo主语should/would/could/mightdou 虚拟3大省略+倒装句1. Were it_ (=If it were) not for the air, we couldnt survive.2. Had I (=If I had) known abou
2、t it, I would have told you.3. Should anyone (=If anyone should ) call, please take a message.u 虚拟语气省略与倒装在写作中的应用its application in writing1. 人类要是早点意识到环保的重要性，他们就不会成为环境恶化的受害者了。1) If people had realized the significance of environment protection earlier, they wouldnt have fallen victim to the environme
3、ntal degradation. 2) _Had people realized the significance of environment protection earlier, they wouldnt have fallen victim to the environmental degradation.（倒装）2. 要不是你毫无保留的帮助和无条件的支持，我的一切成就将化为灰烬.1) If it hadnt been for your unreserved help and unconditional support, all my achievements would turn
4、to ashes. 2) Had it not been for your unreserved help and unconditional support, all my achievements would turn to ashes.（倒装）3. 如果你还有什么其他问题，不要犹豫联系我们。 If you should have any further questions, please dont hesitate to contact us.4. 如果我们早点采取措施应对工厂废水排放引发的问题，这条河流现在就不会被污染的那么严重了。If we had taken effective m
5、easures to wrestle with/tackle/handle the problem arising from industrial waste emission much earlier, the river would not be polluted so seriously now.5. 要不是这次有意义的研学活动，我不会对学习的重要性有了更新更深入的了解。But for/ Without this rewarding study trip, I wouldnt have got a new and deeper insight into the significance
6、of study.u 含蓄虚拟条件句 （有假设，无if)，常用的有with，without，but for，if only, or，but；otherwise, 分词等。1. I was ill that day. Otherwise, I would have taken （本会参加）part in the sports meet.2. He telephoned to inform me of your birthday, or I would have known（本不会知道）nothing about it .3. But for your help, I would have kno
7、wn （本不会成功）succeeded.4. Without you help, I wouldnt have achieved（本不会取得如此多成就）so much.5. I should have given（本应该给你）you more help, but I was too busy.u 几种特殊的虚拟语气1. 虚拟语气用在as if (as though)引导的从句中1) did （表现在的假设）2) had done （表过去的假设）3) would/might/could do（表将来的假设）2. 宾语从句中的虚拟语气，“wish +宾语从句” “if only +句子” 用在虚
8、拟语气中, 表不能实现的愿望1) did / were （表“现在的假设”)2) would/could do (表“将来的假设”)3) had done （表“过去的假设”)3. Its (about/high) time 从句：It is (about/high) time that sb did/ should do Warning：should不可省！是时候呼吁学生投入适当时间来反思自己的学习问题了。It is about/high time we appealed to the students to devote/commit/dedicate a proper amount of
9、 time to reflecting on their learning problems.4. It/This is the first /second time that sb _have/has done_5. It/This was the first /second time that sb _had done_1) did (与现在，将来相反2) had done （与过去相反）6. 在for fear that, in case, lest引导的从句中，若用虚拟语气时，从句谓语为：（should） + do。并且should能省略（for fear that，lest），in case不能省略。7. 在so that / in order that所引导的目的状语从句中，从句中的谓语为：may (might)can (could) + doshould
