不及物动词向及物动词转化需要借助于介词、副词等构成短语动词。 He is working hard at English. ③状态动词(相对静止):contain, exist, own, prefer, belong ④动作动词:延续性(work, stay);非延续性(marry, go, come) 2.系动词 ①表示人或事物的特征和状态:be, fee...