英语语法中的虚拟语气，怎么用呢？

Subjunctive Mood (虚拟语气)

从句 主句
现在时间 陈述语气 does shall/will do
虚拟语气 did should/would do
过去时间 陈述语气 did should/ would do
虚拟语气 had done should/would have done
将来时间 陈述语气 does, am/is/are to do shall/will do
虚拟语气 should do, were to do should/would do

Wish虚拟句
现在式→过去式， 过去式→过去完成式
＊ 如果wish是过去式，虚拟从句无时态变化。
＊ wish cf· hope wish引导的从句表示愿望实现的可能性很小
hope 引导的从句表示愿望有可能实现

动词 advise, agree, appoint, arrange, argue, ask, command, decide, decree, demand, desire, determine, direct, expect, insist, intend, order, permit, persist, propose, prefer, pray, provide, recommend, request, require, suggest, urge等之后加(should) do.
动词变成过去式，从句无时态变化。
上述动词转化成名词后，引导的从句也加(should) do
eg. I suggest that a meeting (should) be held as soon as possible.
My suggestion is that a meeting (should) be held as soon as possible.
I suggested that a meeting (should) be held as soon as possible.

It