It is high time that：现在是……的时候了，是时候……
It is high time that we should tell him the truth.
是咱们该奉告他实情的时刻了。
Therefore, it is high time that we took effective measures to improve the current situation.
因此，采取一些必要措施来改善这种情况已经是当务之急。
As far as I am concerned, it is high time that we did something.
我觉得是时候我们该做些什么了。
It is high time that:we(should)put an end to this controversy.
现在是结束这种做法的时候了。
It is high time that you did (should do) your homework.
你确实该去做作业了。
It is high time (that) we began to work.
咱们该开始工作了。
