It is (high) time that 啥意思
来源：“It is (high) time that...” 是一个常用的虚拟语气句型，意为“是时候做某事了；早该做某事了” 。
在这个句型中，that从句的谓语动词有两种形式：
1. 用一般过去时表示对现在或将来情况的虚拟。例如：It is high time that we went to school.（我们该去上学了。实际还没去，用一般过去时表示虚拟，早该去了。）
2. 用“should + 动词原形”，should 不可以省略，同样表示虚拟。例如：It is time that we should take some measures to protect the environment.（是时候我们该采取一些措施来保护环境了。）
一般来说，用一般过去时的情况更为常见。这个句型用来强调做某事的紧迫性，提醒人们该做某事了。
16.8 It is (high) time that
It is (high) time that 后面的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.
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