主谓一致
动词是表示动作或状态的词。

动词在句中充当谓语时，它的形式要受主语的限制，要和它在人称和数上一致，
因此常称为动词的限定形式，这种形式主要表现在：
1 ．人称上与主语一致
2 ．与主语在数上一致
3 ．时态变化( 表示动作发生时间)
4 ．语态( 表示主语是做动作的人或物)
5 . 语气( 表示说话人认为这句话是事实，是要求做的事还是假想的事)
一. 名词做主语时的主谓一致
1. 名词作主语，是单数时谓语动词用单数，是复数时谓语动词用复数。

2. 其中集合名词情况需另外鉴别，一些单复数同形的词需根据上下文确定其单复数含义，再配合动词；
The football team consists of 20 players.
The football team are having a bath now.
常见的这部分名词有: army, audience, class, club, committee, company, crowd, couple, family, group, government, jury, party, personnel, staff, team, union, public等.
有些集合名词如: folk, people, police, youth等, 总是跟复数动词形式.
The police have caught the murderer.
PS: people 意为民族，种族时，有单复数之分;police 意为“警察机关”时，可用作单数。

The Chinese people is a greet people.
3. 单复数同形的名词作主语, 要根据意义来决定谓语的形式. 常见的这部分名词有: aircraft, deer,
fish, means, sheep, species, series, works headquarters 等
The species of fish are numerous.
This species of rose is very rare.
Every means has been tried.
The means of communication between here and outside are interrupted.
[规则一] 如果名词后面跟有as well as, like, together with, including, no less than( 不少于，多达）, rather than, as much as, accompanied by, in company with, besides, but, except, in addition to, along with 等词时，其谓语动词与这些名词前面那个名词的数一致。

例如：
Mr. Smith, together with his wife, is to arrive.
A library with five thousand books is offered to that nation as a gift.
All but one were here just now.
[规则二] 复数名词用作专有名词时，用单数谓语。

例如：
The United States was founded in 1776.
His Selected Works was published in 1957.
[规则三] 表示由两部分构成的物体的名词，如：glasses ，gloves ，jeans ，pants ，scales ，scissors ，trousers 等，若被 a pair of修饰，用单数；如果pair为复数，谓语用复数。

例如：
Here is a pair of glasses.
Three pairs of scissors are lying in the drawer.
[规则四] 以定冠词+形容词(或分词) 做主语，是形容词的名词化用法。

如果指的是一类人，谓语动词用复数形式；如果指的是抽象概念（一类不可数的事物）时，则谓语动词用单数。

例如：。