返回目录：ppt怎么做
英语虚拟语气是语法中比较难掌握的一个知识点，其变化多端，跟时态密切相关。是用来表示假想，而不表示客观存在的事实，所说的是一个条件，不一定是事实，或与事实相反。
一、虚拟语气用于条件状语从句中
1.表示与现在事实相反的假设，条件状语从句中的谓语动词用“过去式（be动词的过去式用were）”，而主句中的谓语动词用“would / should/ could / might + 动词原形”。如： If I were a boy, I would join the army. If the had time, she should go with you.
2.表示与过去的事实相反，条件状语从句中的谓语动词用过去完成时，主句中的谓语动词则用“would / should / might / could + have +过去分词”。如： If he had taken my advice, he would have succeeded in the competition.
3.表示与将来事实相反，条件状语从句中的谓语动词一般过去时或should(were to) + 动词原形，而主句中的谓语动词则用would / should/ could might + 动词原形。如； If it were to rain tomorrow, the football match would be put off.
4.当条件状语从句表示的行为和主句表示的行为所发生的时间不一致时，动词的形式要根据它所表示的时间作相应调整。如： If they had worked hard, they would be very tired.(从句说的是过去，主句指的是现在)
二、虚拟语气用于名词性从句
1.虚拟语气在宾语从句中的运用。 ①“wish + 宾语从句”表示不能实现的愿望，译为“要是……就好了”等。表示现在不能实现的愿望，从句中的谓语动词用一般过去时；表示将来不能实现的愿望，从句中的谓语动词用“would/could + 动词原形”；表示过去不能实现的愿望，从句中的谓语动词用“had + 过去分词”或“could(should) + have + 过去分词”。如： I wish it were spring all the year round. I wish I had known the answer. I wish I could fly like a bird. ②在表示建议、要求、命令等的动词suggest、advise、propose、demand、require、insist request、command、order等后的宾语从句中，谓语动词用should + 动词原形或是动词原形。如： She suggested we (should)leave here at once. The doctor ordered she should be operated.
2虚拟语气在同位语从句和表语从句中的运用。 作表示建议、要求、命令等的名词advise、idea、order、demand、plan、proposal、suggestion、request等的表语从句和同位语从句，从句中的谓语动词用“（should） + 动词原形”。如： His suggestion that we (should)go to Shanghai is wonderful. My idea is that they (should)pay 100 dollars.
三、虚拟语气在其他场合的运用
1虚拟语气在as if/as though、even if/even though等引导的表语从句或状语从句中，如果从句表示的动作发生在过去，用过去完成时；指现在状况，则用一般过去时；指将来状况则用过去将来时。如： He did it as if he were an expert. Even if she were here, she could not solve the problem.
2虚拟语气用于定语从句中。 这种从句常用于句型“It is (high)time (that) … ”中，定语从句的谓语动词用一般过去时(be用were)或should + 动词原形，意思是“(现在)该……”。如： It’s time that I picked up my daughter. It’s high time we were going.
3虚拟语气用在if only引导的感叹句中。如： If only I were a bird. If only I had taken his advice.
以上是虚拟语气的一些方法，熟练的运用上述方法，你就基本掌握了虚拟语气的运用技巧，虚拟语气是有规律可循的，自己在学习中多多探寻规律，可以提高自己的学习速度与质量，要努力提高自己学习英语的兴趣，这是很重要的