when while and see sb doing sth

when while and see sb doing sth see sb.doing sth. 关于while/when和see sb doing的问题 see sb.do sth和see sb.doing sth.区别 关于see sb do sth和see sb doing sth when sb doing sth,sb doing sth 这个句型可不可以? watch sb doing sth \ watch sb do sth \ see sb doing sth\ see when sb.do sth.还是 when sb.doing sth. see sb doing sth的中文 英语like to see sb doing sth 关于see sb do/doing sth see/hear sb.doing sth.造句