Wake up! It's eight o'clock.

醒醒吧！已经八点钟了。

It's time for breakfast. It's eight o'clock.

到吃早饭的时间了，现在是早上八点整。

It's eight o'clock , I'll come in two hours .

现在是八点钟，我两小时后回来。

What time is it? It's at eight o'clock.

什么时间了？八点了。

In Beijing, drivers have to keep their lights on even though it's already past eight o'clock in the morning.

在北京，虽然现在已经过了早上八点钟，但是司机不得不开着车灯。

Yes, eight o'clock. But by the time we finish the dinner, it's time to go to bed.

是啊。八点就到家了。但是等我们吃完晚饭就该上床睡觉了。

You ought not to/ shouldn't be sleeping now. It's already eight o'clock.

你不该还在睡觉，都已经八点了。