精选优质文档-倾情为你奉上英语句子成分和英语句子结构讲解及练习主语（subject）: 是执行句子的行为或动作的主体。The sun rises in the east.（名词） He likes dancing.（代词）Twenty years is a short time in history. (数词)Seeing is believing. （动名词）To see is to believe. （不定式） What he needs is a book. （主语从句）It is very clear that the elephant is round and tall like a tree.（It形式主语，主语从句是真正主语）谓语（predicate）: 说明主语的动作、状态和特征。We study English. He likes playing the games.表语（predicative）: 系动词之后的成分，表示主语的性
