抽象词虚拟语气 1、 与现在的事实相反：从句用过去式，主句用would/could/might/should/+动词原形 例如；If I had time ，the classroom would be so clean 如果我有时间，教室将会更加干净。 2、 与过去的事实相反：主句用would/could/should/might/+have+ done , 从句中过去完成时 例如；If I had finished my homework ，I would have passed that test 如果当时我完成了我的做，我就能够通过我的考试了。 3、与将来的事实相反：主句用：should/could/would/might/+动词原形，从句用should do （可能性最大），过去式（可能性一般）were to do （可能性最小） If it should snow tomorrow，I would make a snowman 如果明天下雪，明天我将对一个雪人 If it snowed tomorrow，I would make a snowman 如果明天下雪，明天我将堆一个雪人 If it were to snow tomorrow ，I would make a snowman 如果明天下雪，我将对一个雪人 虚拟语气的倒装形式 If I had worked hard ，I would have finished it 如果当时我努力工作，我就已经完成它了。 =Had I worked hard ，I would have finished it If it should snow tomorrow ，I would make a snowman 如果明天下月，我将会对雪人 Should it snow tomorrow ，I would make a snowman If it were to snow tomorrow ，I would make a snowman =Were it to snow tomorrow ，I would make a snowman 虚拟语气在各类从句中的用法 1、I lifted the chair so that I could be seen 我举起椅子就是为了能被看见 （状语从句） 状语从句中常见连接词：as if 好像，as though 好像，in order that 为了，for fear that 生怕， In case 万一，lest 以防万一， 2、主语从句： It is +形容词 +that+ 主语+（should+动词原形），should可以省略 It is very important that we （should ）study English every day 我们每天学习英语是很重要的。 3、 宾语从句；I wish I would visit the moon我祝愿自己能有一天拜访月球。 I would rather you had helped me out two days ago 我倒想你能在两天前帮助我 宾语从句常见句型： 主语+常见动词+that+ 主语+ should+动词原形 本文来源：https://www.wddqw.com/doc/46739399de3383c4bb4cf7ec4afe04a1b071b018.html