虚拟语气讲解：
英语中的各种语气：
1， 陈述语气： I like apples 我喜欢苹果。（肯定）
I don't like apples我不喜欢苹果（否定）
2， 疑问语气： What's your name？你叫什么名字？
Do you like apples?你喜欢苹果？
3，祈使语气： Open the door 打开门
3， 虚拟语气： If I were you, I would forgive her如果我是你，我将会原谅她。
虚拟语气结构讲解：
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。
4， 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
I suggest that you should do your homework 我建议你应该做你的作业。
表语从句；He looked as if he had been here for many years 他看起来好像已经很多年了。
同位语从句：
I make a proposal that we should hold a meeting next week 我提议下周召开一次会议
虚拟语气常见词汇：，demand 要求，require 要求，proposal提议，advise 建议，order 命令，suggest建议
虚拟语气的其他用法：
祝愿： Long live peace 和平万岁
It is （high）time that 主语 should/过去式
It's time that we had a break 我们早该休息了
It's （high）time that we should protect ourselves 我们是时候保护我们自己了。
