see sb do sth = sb be seen to do sth (指动作已结束)
see sb doing sth = sb be seen doing sth (指动作正在进行)
根据句意:是指‘学生刚才被看见正在操场踢足球.,故正确的是A
see sb do sth = sb be seen to do sth (指动作已结束)
see sb doing sth = sb be seen doing sth (指动作正在进行)
根据句意:是指‘学生刚才被看见正在操场踢足球.,故正确的是A