英语句子成分和英语句子结构讲解及练习1. 主语（subject） 句子说明的人或事物。可以由名词（短语），代词（短语），动名词（短语），数词(短语)，非谓语动词（to do/ doing), 主语从句充当。The sun rises in the east.（名词）He likes dancing.（代词）Five and four is nine. (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。可以由动词或动词短语充当，或由系动词+表语充当。We study English.He is asleep.The police will look into the
