谓语受主语的支配，须要与主语在人称和数上来保持一致，这就叫做主谓一致。主谓一致一般是要遵循三条原则：语法一致原则，意义一致的原则及就近一致的原则。 中学生夏令营>>>>
（1）以单数的名词或代词，动词的不定式短语作主语的时候，谓语动词就是要用单数；主语为复数时，谓语用复数，例如：
He goes to school early every morning.
（2）由and或both……and衔接的并排成分作主语时，谓语动词用复数。例如：
Both he and I are right.
Mr Black and Mrs Black have a son called Tom.
但并排主语假如指的是同一人，同一事物或同一概念，谓语动词用奇数。例如：
His teacher and friend is a beautiful girl.
The poet and writer has come.
（3）由and衔接的并排奇数主语之前假如分别由each, every润饰时，其谓语动词要用奇数方式。例如：
In our country every boy and every girl has the right to receive education.
Each man and each woman is asked to help.
（4）主语是奇数时，虽然后边跟有 but ,except, besides, with 等介词短语，谓语动词仍用奇数。例如：
The teacher with his students is going to visit the museum.
Nobody but two boys was late for class.
Bread and butter is a daily food in the west.
（5） 一些只要复数方式的名词，如people, police, cattle, clothes等作主语时，谓语动词要用复数。例如：
A lot of people are dancing outside.
The police are looking for lost boy.
（6）由each, some, any, no, every 构成的复合代词作主语时，谓语动词都用奇数。例如：
Is everybody ready?
Somebody is using the phone.
（7）有两部分构成的物体的名词，如glasses, shoes, trousers, chopsticks, scissors 等作主语时，谓语动词用复数。例如：
Where are my shoes? I can’t find them.
Your trousers are dirty. You’d better change them.
假如这类名词前用了a pair of等，则通常用作奇数，谓语动词的单复数方式通常取决于pair的单复数方式。例如：
Here are some new pairs of shoes.
My new pair of socks is on the bed.