关于英语语法.saw sb doing sth 和 see sb to do sth有什么区别?不一样都是看过某人做过某

关于英语语法.saw sb doing sth 和 see sb to do sth有什么区别?不一样都是看过某人做过某 see sb.do sth和see sb.doing sth有什么区别 see sb.do sth和see sb.doing sth.区别 关于see sb do sth和see sb doing sth hear sb do sth和doing sth有什么区别有to do sth吗 get sb to do sth 和 get sb doing sth有什么区别 get sb to do sth 和get sb doing sth 有什么区别? teach sb doing sth和teach sb to do sth有什么区别 persuade sb to do sth和persuade sb into doing sth 有什么区别 keep sb doing sth 和keep sb to do sth 有什么区别啊 help sb doing sth 和help sb to do sth 有什么区别? leave sb doing sth和leave sb to do sth有什么区别?