———jimmy often ————(see)to play football on the playground after school?

问题描述:

———jimmy often ————(see)to play football on the playground after school?
空格处答案是is seen,可是为什么用被动,我觉得has seen不是也可以马吗?

see sb do看见某人做某事,其被动形式为sb be seen to do,to不能省.
所以从to可以看出这里应该是被动语态.所以是is seen.