He often sees his son[ ](play with)his friends.该填什么?

问题描述:

He often sees his son[ ](play with)his friends.该填什么?

playing with
他经常看到儿子同他的朋友在一起玩。
see sb doing sth 看到某人做什么

原型

playing with
see sb doing sth 看到某人做什么
他经常看到他儿子同他的朋友玩在一起