在英语中，"起床"通常用"wake up"来表示。

"Wake up"是一个短语动词，意思是"醒来"或"被唤醒"。它来自古英语中的"weccan"，意思是"变得清醒"或"被唤醒"。

下面是一些例句：

Can you please wake up? 请你醒醒吗？
I set my alarm to wake me up at 6:00 every morning. 我设置我的闹钟在每天早上6点醒来。
He wakes up early every day. 他每天都很早醒来。
She wakes up feepng refreshed after a good night's sleep. 她睡了一个好觉后感觉精神焕发。

如果你想用英语表达"叫他起床"，你可以使用下面的句子：

Can you wake him up, please? 请你叫他起床吗？
I'm going to wake him up now. 我现在要叫他起床。
I tried to wake him up, but he just wouldn't get up. 我试着叫他起床，但他就是不起床。
I'll go wake him up. 我会去叫他起床的。