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The boy and the girl in the swimming pool.
swim
什么是主谓一致？
谓语动词在人称和数上要和主语一致
语法一致原则
主谓一致
语法一致原则
He is the tallest student in his class.
It takes her 2 hours to finish her homework.
主语是单数，谓语动词为单数
be → is/was
行为动词→ 三单
They are looking forward to visiting the museum.
Tom and Mike go to school together.
主语为复数，谓语动词用复数
be→ are/were
行为动词用原形
Both he and I are right.
Mr. Black and Mrs. Black have a son called Tom.
and/both...and连接的并列成分作主语时，谓语动词用复数
His teacher and friend is a beautiful girl. 他的老师也是他的朋友
The poet and writer has come. 这个人既是作者也是诗人
并列主语如果指的是同一人，同一事物或同一概念，谓语动词用单数
In our country every boy and every girl has the right to receive education.
Each man and each woman is asked to help.
Is everybody ready?
Somebody is using the phone.
由and连接的并列单数主语之前如果分别由each, every修饰时
其谓语动词要用单数形式
由each, some, any, no, every 构成的复合代词作主语时