It is time for us to do somthing.意思是:轮到我们做某事
It is (high) time that 这是一个虚拟语气的句型,后面的谓语动词有两种:1.动词的过去式2.should+动词原形,但是should不能省略;翻译为:到什么什么的时候了
如: It is time that the children went to bed.
It is high time that the children should go to bed.
孩子们睡觉的时间到了。
作文中常用,是到了必须采取措施治理污染的时间的了
:It is high time that effective measures should be taken to resolve the pollution
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