We saw her play the piano at the party.这句话里play为什么用原形呢?
问题描述：
We saw her play the piano at the party.这句话里play为什么用原形呢?
答
表感官的动词如：see hear watch 等的宾补，要求用省略不定式符号to的不定式。
答
see sb do sth
看到某人做某事