It' s time that和 It‘s high time that 区别?

It's time + that clause 时，that可省略，time可由high,about修饰，从句中的谓语动词有两种形式，或者用动词的过去式(be用were)；或者用shoud + 动词原形（should不能省略)。此句型为虚拟语气句型，表示“现在某人该做某事了”。含有该事早该去做而未做，现在去做似乎都为时已晚的意思。例：
It's time （that）we went to bed.
我们该去睡觉了。
It's high time that the article were published.
发表这篇文章是适时的。
It's time you should do cleaning.
你该去打扫卫生了。
It is high/about time that 正是干……的时候了high/about 只是对time 强调
从句谓语动词要用过去式或用should加动词原形，但should不可省略。
It is time that the children went to bed.
It is high time that the children should go to bed.

It' s time that：到了该做某事的时间了。强调到了这个时间点
It‘s high time that ：是该做某事的时候了。强调到了做某事的时机、时候，并不特指某一时点！

你好。it is time + 句子== it is （about / high）time + 句子
---------没有区别啊。加了about / high 只是为了强调。不影响句子的根本意思。

区别很简单，只不过后者强调high ，语气更加强烈，强调时间的迫切
It' s time that 到了....的时候了
It‘s high time that 真到了....的时候了
希望能帮到你，祝学习进步

It's time + that clause 时,time可由high,about修饰,有两种形式：动词的过去式(be用were)；或者用shoud + 动词原形（should不能省略).虚拟语气句型,表示“现在某人该做某事了”.