perhaps we have seen young children playing together.play为什么加ing

perhaps we have seen young children playing together.play为什么加ing

see sb doing可以用在陈述一件事情的时候

1.see sb. do sth 看到某人做某事 如：I often see him study at home.
2.see sb. doing sth. 看到某人正在做某事 如：I saw them fighting on the playground.
3.see 叫做感官动词，watch, see, hear, listen to, notice等都是感官动词，用法同“see"。