英语句子成分和英语句子结构讲解1. 主语（subject）: 句子说明的人或事物。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）2. 谓语（predicate）: 说明主语的动作、状态和特征。We study English. He is asleep. 3. 表语（predicative）: 系动词之后的成分，表示主语的
