keep sb/sth + 请问什么时候加现在分词,什么时候加过去分词呢

keep sb/sth + 请问什么时候加现在分词,什么时候加过去分词呢 请问：是keep sb. do sth.还是 keep sb doing sth. keep sb （）sth 请问什么时候用 see sb doing sth 什么时候用 look at sb doing sth什么时候用 watch sb doing sth keep sb doing sth例句 keep sb to do sth keep sb./sth.+V-ed 有没有keep sb sth? Sb keep sb doing sth造句 Sb keep sb from doing sth造句 请问什么时候用for如:buy sth for sb 什么时候用to如：show sth to sb 力求要细, 什么时候用sth.of sb.什么时候用sb's sth keep sb.+形容词和keep sb.doing sth. prevent keep sb/stop/sth from sth doing sth造句 give sth to sb ,give sth for sb请问什么时侯,用to什么时候用for.请说的明白一点, keep sb/sth adj.和keep sb/sth doing sth的区别 keep sb/sth dong sth和keep sb/sth ＋adj的区别 keep sb./sth.doing sth.和keep sb./sth. +形容词的区别 求例句