专题07 虚拟语气（讲解）-备考2021年高考英语语法分类讲解+十年真题解析

一．语气 英语中的三种语气, 语气是动词的一种形式, 用来说明我们对自己的话所采取的态度。 1.陈述语气（疑问, 否定, 肯定, 感叹） 2.祈使语气（命令, 要求, 建议, 警告） 3.虚拟语气：不可能发生的事, 愿望, 建议, 与事实相反的假设等. He is a boy. Is he a boy? Don’t forget he is a boy. If I were a boy, I would cry loudly. 二．If引导的虚拟条件句 If引导的虚拟条件句 从句（条件） 主句（目的） 表示于现在事实相反的虚拟条件句 If+主语+did（be用were） If I had time, I would attend the meeting. 主语+4D2T +do (would/should/could/need /might/ought to) 表示与过去事实相反的拟条件句 If+主语+had done If he had hurried, he could have caught the train. If we had started earlier, we would not have missed the train. 主语+ 4D2T +have done (would/should/could/need /might/ought to) 表示与将来事实相反的虚拟条件句 If+主语+did If+主语+were to+ do If+主语+should +do If I were to go abroad ,I would go to America. If it should rain tomorrow, the crops could be saved. 主语+ 4D2T +do (would/should/could/need /might/ought to) 1.If 的省略：可以把虚拟条件中的连词if省去, 而将had, should, were等助动词提到主语之前。 If she were younger, she, would do it. 去if：Were she younger, she would do it. If you had come earlier, you wo