It is 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。这个句型可以用在作文结尾，表达一种号召或提议。意为“到了该做......的时候了”。
It is time that the children went to bed.
It is time (that) 后所接的从句采用的时态是did一般过去时或should do其中的should不省略的两种形式。
It’s (high/ about) time (that) + 主语 + did
It’s (high/ about) time (that) + 主语 + should do
事实上，It’s (high/about) time (that) 后所接的从句还可以使用四种其他形式
It’s (high/ about) time (that) + 主语 + ought to do
It’s (high/ about) time (that) + 主语 + was/were doing
It’s (high/ about) time (that) + 主语 + could do
It’s (high/ about) time (that) + 主语 + do
It's (high/ about) time (that) + 主语 + are doing
扩展资料
相关用法：It's the first time that句型
一、结构：
这是一个固定句型。“这是某人第一次做某事”
It is the first time that ... has/have done sth.
二、用法：
一个特殊的句型强调句，主要考察that后面的用法。一般说来，在It [This] is the first time＋that-结构中，that-从句通常用现在完成时：
例：It was the first time that she had sung in public.
那是她首次公开演唱。
It was the first time that she had lived independently.
那是她第一次独立生活。
若It was the first time that-结构中,that-从句通常用过去完成时,有时也用一般过去时,有时若有包括现在在内的时间状语,偶尔还可用现在完成时：
例：I was lucky because that was the second time I (had) visited Japan that year.
我很幸运,那是我那年第二次访问日本。