虚拟语气英语语法知识点
1)时态:可以表示过去,现在和将来的情况。它的基本特点是时态退后。
同现在事实相反的假设。
句型 : 条件从句主句
一般过去时should( would) +动词原形
If they were here, they would help
表示于过去事实相反的假设。
句型: 条件从句 主句
过去完成时 should(would) have+ 过去分词
If she had worked harder, she would have
The rice would not have been burnt if you had been more
If my lawyer had been here last Saturday, he would have prevented me from
If he had come yesterday, I should / would have told him about
含义:He did not come yesterday, so I did not tell him about
If he had not been ill and missed many classes, he would have made greater
含义: He was ill and missed many lessons, so he did not make greater
表示对将来的假想
句型: 条件从句 主句
一般过去时 should+ 动词原形
were+ 不定式 would + 动词原形
should+ 动词原形
If you succeeded, everything would be all
If you should succeed, everything would be all
If you were to succeed, everything would be all
混合条件句
主句与从句的动作发生在不同的时间,这时主,从句谓语动词的虚拟语气形式因时间不同而不同,这叫做混合条件句。
If you had asked him yesterday, you would know what to do
(从句与过去事实相反,主句与现在事实相反。)
If it had rained last night (过去), it would be very cold today (现在).