It's time+动词的用法急用

It's time...表示“该是……的时候了”,大致有以下五种用法.
⑴ It's time for + n.“该是（干）……的时候了.”例：
Boys and girl,It's time for class.
同学们,该上课了.
⑵ It's time + (for sb.) to do sth.表示“该是（某人）干……的时候了.”例：
It's time for you to clean the classroom.
该是你打扫教室的时候了.
It's time to go to school.
该去上学了.
⑶ It's time + that clause,that可省略,time可由high,about等形容词修饰,从句中的谓语动词需要用虚拟,有两种形式：
①用动词的过去式(be用were)；
②用shoud + 动词原形（should不能省略).
此句型为虚拟语气句型,表示“现在某人该做某事了”.含有该事早该去做而未做,现在去做似乎都为时已晚的意思.例：
It';s time （that）we went to bed.
我们该去睡觉了.
It's high time that the article were published.
发表这篇文章是适时的.
It's time you should do cleaning.
你该去打扫卫生了.
⑷ It's + the/序数词+ time +to do sth.表示某人第几次做某事.例：
It is my first time to write letter in English.
这是我第一次用英语写信.
⑸ It's + the+序数词+ time+ that clause.也 表示某人第几次做某事,但是从句需用现在完成时.例：
It is my first time that I've even written letters.
这是我第一次用写信.
句型⑷ 句型 ⑸ 可以互换.

It's time for sb. to do sth.
it's time to do sth.

it's time to go~