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2. 由连接词and或both …… and连接起来的合成主语后面，要用复 数形式的谓语动词。如：Lucy and Lily are twins. / She and I are classmates. / The boy and the girl were surprised when they heard the news. / Both she and he are Young Pioneers. 注意：(1)若and所连接的两个词是指同一个人或物时，它后面的谓 语动词就应用单数形式。如：The writer and artist has come. (2) 由and连接的并列单数主语前如果分别有no, each, every more than a (an) , many a (an)修饰时，其谓语动词要用单数形式。如： Every student and every teacher was in the room. / No boy and no girl likes it.