Arthur spends all his free time his grandson

问题描述:

Arthur spends all his free time his grandson

on
spend on sth 花时间在某事上
spend in doing sth 花费时间做某事
Arthur spends all his free time his grandson
亚瑟把他所有的空余时间都花在他的孙子上。

Arthur spends all his free time his grandson
作家把他的空余时间都花在了他的孙子身上
这里是个短语:spend some time /money on sth
等于
spend some time/ money in doing sth