vi. 下班，停止，中断（工作等）
When do you usually knock off? 你一般什么时候下班？
He knocked off for lunch at half past eleven. 他十一点半休息吃中午饭。
2、He asked me for a meal and a glass of beer.
ask (sb.) for sth =request for sth. 问某人要什么东西
（for为了这个目的去请求某人, sb.更多的时候不出现, ask for sth.）
The boy asked (his parents)for money again/once more.
3、In return for this, the beggar stood on his head and sang songs.
in return for this 作为对……的回报，作为交换（this 在代词当中常常指代上文的一件事情）
I'll buy a present for him in return for hospitality. （hospitality adj. 热情）
in return 作为回报（重要考点）
You lent me this interesting book last month. In return (for it), I’ll show you some picture books.
In return for your help, I invite you to spend the weekend with my family.
He doesn't want anything in return. 他不想得到任何回报
stood on his head 倒立
stand on one's hands 用手着地(hand单数就是一只手, 双手复数)
