I think it's time you went to bed. 我想你该睡觉了。
It's time we went [were going, should go]. 我们该走了。
I think it's time they were taught a lesson. 我想现在该给他们一点教训了。
注:time前有时有about和high修饰:
I think it's high time that she made up her mind. 我想她该拿定主意了。
与其他的虚拟结构不同,该结构不能在该用 was 时而用 were。如:
It's time I was in bed. 我该上床睡了。(不用were)