she is a girl.the book is mine.my parents arefriendly.求他们是主谓宾还是主谓表
She is a girl.是主系表结构,主语She,be动词is, 表语 a girl
The book is mine.是主系表结构,主语 the book, be动词是is,表语是mine
My parents are friendly.同样是主系表结构,主语My parents, be动词是are,表语是friendly