简单理解: 句子只有一个主谓结构(不管这个主语有多少个,谓语有多少个)就叫做简单句。 如: My father and my mother are teachers and love their work.两个并列主语,两个并列谓语。但只是一个主谓结构。简单句 My father and my mother are teachers and they love their work. 两个主语My father and my mother,they;两个谓语:are teachers;love their work 两个主谓结构。并列句。