I stayed awake on purpose until half past eleven.
我故意不睡觉熬到十一点半。
It's only half past eleven.
现在才十一点半。
At about half past eleven, when the floor began to shake under him.
大约十一点半左右,突然地板动了起来。
I stayed awake on purpose until half past eleven one evening in order to have a good look at the moon for once by myself.
有一天晚上,我熬到11点半故意不睡觉,为的是独自好好看看月亮一次。
It was now already half past eleven, but Tu Wei-yueh at the factory had not yet telephoned the expected news of victory.
钟上已经是十一点半了,预料中的.屠维岳的告捷电话竟没来。