it is high time that +should do 与it is high time that +did的区别?怎么有些时候后面加did 而不是should do呢?

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it is high time that +should do 与it is high time that +did的区别?怎么有些时候后面加did 而不是should do呢?
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it is high time that +should do 与it is high time that +did的区别?怎么有些时候后面加did 而不是should do呢?
it is high time that +should do 与it is high time that +did的区别?
怎么有些时候后面加did 而不是should do呢?

it is high time that +should do 与it is high time that +did的区别?怎么有些时候后面加did 而不是should do呢?
It is time + that-从句, 从句用 sb. did...比较常用, 或sb. should do不常用.
两种皆可! 楼主问这问题,难道确定他们有区别吗?

标准用法应该加 虚拟语气(过去时的形式did)
非正式用法可以用should do

should 是强调吧比后面语气应该强一些

前者是应该做但未做,后者是应该做并且已经做了!