found sb doing/do sth 到底怎么区分...

found sb doing/do sth 到底怎么区分... 有没有tell sb doing sth?跟tell sb to do怎么区分? Let sb(do/doing)sth Find sb doing/do sth watch sb do/doing sth;see sb do/doing sth；hear sb do/doing s 恩 hear sb doing sth hear sb do sth 怎么造句啊 hear sb.do sth.和 hear sb.doing sth.怎么使用? 怎么区分这两个?有俩个词组:1.see sb do sth 见到某人做过某事或经常做某事2.see sb doing s 用英语造句①have great fun②found sb doing sth③help sb to do④make s help sb do sth help sb doing sth help sb to do sth help sb w 紧急】see sb do/doing sth,watch sb do/doing sth,look at sb do/d tell sb doing sth还是tell sb to do sth