虚拟语气 时态

题目

虚拟语气 时态
虚拟语气有哪些时态

答案

现在① 表示与现在事实相反的情况：
主语+should/would/could/might+do+其他+if+主语+did/be(were)+其他
例：
1.If I were you,I would take an umbrella.如果我是你,我会带把伞.（事实：我不可能是你）
2.If I knew his telephone number,I would tell you.如果我知道他的电话号码,我就会告诉你.（事实：不知道）
3.If there were no air or water,there would be no living things on the earth.如果没有水和空气,地球上就不会有生物.(事实：地球上既有空气也有水)
过去②表示与过去事实相反的情况
主语+should/would/could/might+have done+其他+if+主语+had done +其他
例：
1.If I had got there earlier,I should/could have met her.如果我早到那儿,我就会见到她.（事实：去晚了）
2.If he had taken my advice,he would not have made such a mistake.如果他听我的劝告的话,就不会犯这样的错误了.（事实：没有听我的话）
将来③表示对将来情况的主观推测（可能相反或可能性很小）
主语+should/would/could/might+do+其他+if+主语+did/should/were to do+其他
例：
1.If he would come here tomorrow,I should/would talk to him.如果他哪天来这儿的话,我就跟他谈谈.（事实：来的可能性很小）
2.If there were a heavy snow next Sunday,we would not go skating.如果下周日下大雪,我们就不能去滑冰了.（事实：不知能否下雪）
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总结：
现在① 表示与现在事实相反的情况：
If it did ..,I should do..
过去②表示与过去事实相反的情况
If it had done ..,I+should have done..
将来③表示对将来情况的主观推测（可能相反或可能性很小）
If it would do..I should/would do..