我还是分不清楚see sb do sth see sb doing sthi saw him __on the bus

我还是分不清楚see sb do sth see sb doing sthi saw him __on the bus see sb doing sth/to do sth I saw a girl -------(play)the vio see sb.do sth和see sb.doing sth.区别 关于see sb do sth和see sb doing sth see sb.doing sth. 请问是:see sb.do sth.还是saw sb do sth watch sb doing sth \ watch sb do sth \ see sb doing sth\ see 关于see sb do/doing sth always see sb doing/do sth watch sb do/doing sth;see sb do/doing sth；hear sb do/doing s see sb do sth see sb\sth do