2024届高三复习之知识点讲解-虚拟语气课件

高三复习之知识点讲解 ——虚拟语气 1. If 虚拟条件句中的动词形式： 与现在事实相反 与过去事实相反 与将来事实相反 If I were you, I would help him. If I had been free, I would have visited you. If it should rain tomorrow, we would not go camping. 过去时 should/would/could/might + do 过去完成时 should/would/could/might + have done should+动原 should/would/could/might + do 过去时/were to do 类别 与...相反 用法 if 现在 从句动词：过去时（be用were） 主句动词：should/would/could/might + do 过去 从句动词：过去完成时（had done） 主句动词：should/would/could/might + have done 将来 从句动词：过去时/should + do/were to do 主句动词：should/would/could/might + do 1.用所给动词的适当形式填空。 （1）Sally is out of work now. I wonder what you _______________________(do)  if you ______________(be) her. （2）If I _____________(know) you were in difficulty then, I ______________(give) you a hand to tide you over. （3）Mary is a teacher, but she wishes she _______________ (be) a firefighter. would/should/could do were had known would/should/could have given were 1.当从句中含有were, had或should时，可省if; 这时，从句要部分倒装，如：   If I were to meet him tomorrow, I should ask him about it. = Were I to meet him tomorrow, I should ask him about it. 2.有些副词如otherwise以及含without的介词短语，相当于一个if条件句。  I don't have much money. Otherwise, I would have a tour around the world.   Without your help, I couldn't have finished the task within such a short time. 3.从句与主句发生的动作时间不同，需按各自发生的时间来确定虚拟形式。如： If they had studied hard, they could do it easily now.  如果他们以前努力学习的话，现在就会做得容易些。 2. 虚拟语气在名词性从句中的运用： (1) 宾语从句 He suggested that we (should) not change our mind. demand / suggest / order / insist that … (should) + do I wish I could be a pop singer. 与将来事实相反，用would/should/could+动原 与现在事实相反，用过去时 I wish I were a pop singer. 与过去事实相反，用过去完成时 I wish I had been a pop singer. 2. 虚拟语气在名词性从句中的运用： (2) 主语从句 It is strange that such a person should be our friends. It is suggested /demanded /ordered /requested that … should do It is necessary /important /strange that … should + do … 虚拟语气：句子用should