在英语学习中，虚拟语气通常是重点加难点，考试从来不会少出，但又往往弄得同学们焦头烂额，丢分不断，沪江小编今天就来和大家一起学习一下什么是虚拟语气。
英语的动词有三种语气形式，即陈述语气、祈使语气和虚拟语气，陈述语气用来说明事实或就事实提出询问，祈使语气用于表示请求、命令、建议或警告等，而虚拟语气则是谓语动词的一种特殊形式，用来表达假设、猜测、可能或空想等虚拟情况，也可以表示主观愿望或表达某种强烈的感情，通常出现在各类从句中。
一. 条件状语从句：
时间
??从句谓语形式
主句谓语形式
?
将来
?if ＋ 主语＋ 动词过去式(be用were)
?if＋主语＋should +?动词原形
?if＋主语＋were to +?动词原形
?
?? 主语＋would / should / might / could +?动词原形
现在
?if ＋主语＋ 动词一般过去时
主语＋ would / should / might / could +?动词原形
过去
?if＋ 主语＋had done
主语＋would / should / might / could have +?动词过去分词
例句：
1.现在：
If I were you，I would choose that picture.
2.过去：
If you had taken my advice，you would not have made such a mistake.
3.将来：
If there were a sunny day next Sunday，we would go hiking.
?
二. 目的状语从句：
1.在for fear that，in case，lest引导的从句中，若用虚拟语气时，从句谓语为：（should） + do。
eg. He started out earlier in case he (should) be late.
? 2.在so that，in order that所引导的目的状语从句中，从句中的谓语为：can / could / may / might / will / would /should + do。 ? eg. He goes closer to the speaker so that he can hear him clearer. ? 三. 原因状语从句： ? 1. should + 原形动词,表现在或将来 ? eg. He was angry that you should call him by name.?
2. should + 完成式, 表过去
eg. I’m very sorry that you should have failed the test.
?
四.方式状语从句：
虚拟语气常用于as if, as though 引导的方式状语从句：
?时间
?结构
?主句动作之前
?had + 过去分词
?主句动作之后
?would / could / might / should+动词原形
eg. They began to talk warmly as if they had known each other for long.
?? They stopped talking as if someone should come.
?
以上就是沪江小编为大家整理的几种常见的虚拟语气用法，不知道大家有没有好好消化呢？虚拟语气无论大小考试都是必出的重点，同学们必须熟练掌握啊。小编觉得只要多看多练，照着例句自己仿写一下，相信大家很快就能攻破虚拟语气这个大难点了。
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