It is (high) time that 后面的從句謂語動詞要用過去式或用should加動詞原形，但should不可省略。來源：考試大
It is time that the children went to bed.來源：考試大
It is high time that the children should go to bed.
It is time that the children went to bed.來源：考試大
It is high time that the children should go to bed.