I saw him_____(play) the piano slmost every day.

题目

I saw him_____(play) the piano slmost every day.
谁知道这个写什么,还要有理由!

答案

play
see sb do sth
这里只表示一件事情,没有特指当时正在弹钢琴,所以用play
如果是:
I saw him playing the piano slmost at this time yesterday.
我在昨天这时候看到他正在弹钢琴.
这句就强调了当时正在发生的事情.
领会一下.