题目内容：

The favorite Halloween activity for the children is “trick or treat”.介词为什么是用for?

优质解答

表示动作的对象或接受者,意为“给……”、“对…… (而言)”.如:
Let me pick it up for you.让我为你捡起来.
Watching TV too much is bad for your health.看电视太多有害于你的健康.