time的两种意思

time的相关句型：

It's time for sth . 或 It’s time ( for sb . ) to do sth. 意为：该是……的时候了

This is the time when sb . should do sth . 或The time has come when sb . should do sth . 这两个句型也用来表示“该是……的时候了”，when 引导的定语从句用陈述语气或“should + 动词原形”的形式。例如：This is the time when you should get up .是你该起床的时候了。

It's time that...中，that从句中的谓语动词用过去时或用"should+动词原形"(should不能省略)。

It's time we started.(It's time we should start.)

This is the first ( second ， last ) time ( that ) sb . has done sth. 意为：是某人第几次……。