动词的种类 按其作用可分为行为动词(实义动词)、连系动词、助动词和情态动词
行为动词(实义动词) 行为动词意义完整,能独立用作谓语
e.g. The sun shone brightly this morning.
连系动词 连系动词本身有一定的意义,但不完整,不能单独作谓语,必须和表语一起构成谓语。常见的连系动词有be,become,get,look,seem,feel,smell,sound,keep,become,turn,fall等 e.g. She is a good swimmer.