it's high time that we did sth.这里为什么要用虚拟语气?it's time to do sth,这里为什么不用虚拟?

it's high time that we did sth.这里为什么要用虚拟语气?it's time to do sth,这里为什么不用虚拟? It's high time...的用法 it's high time的用法? It’s (about/high)time+that: 请问it's high time 的用法 it's high time that怎么翻译 英语：it's high time是什么意思?详细! it's high time that the fighting It's not big thing! It is high time It is high time it's high time that sb were还是was It's high time that he stopped smoking?翻译 It's high time for sb.to do sth. Dear,it's high time thati forget you it's high time you__(give)up smoking. It' s time that和 It‘s high time that 区别? you （mustn't /can't）smoke in cinema.it's non-smoking area选哪个词