主谓一致
(Agreement between subject and verb)
1.主谓一致是指主语和谓语要保持人称和数上的一致，主语的“人称”和“数”决定谓语动词的变化。如：
(1) I am (be) seventeen. She is (be) sixteen. And how old are (be) you?
(2) There is (be) a desk in the room. There are (be) no chairs in it.
(3) John gets (get) up at six o’clock every morning.
(4) They have (has/have) not come yet. What has (has/have) happened to them?
(5) Nobody knows (know) who is (be) going to win in the competition.
(6) What is (be) the latest news about the World Cup?
如果主语不是单一的，或主语名词的数比较特殊时，则主谓一致一般要依据语法一致、意义一致、就近一致的原则来判断。
2.集体或集合名词作主语时，遵循意义一致原则：如果强调整体，谓语动词用单数；如果强调个体
(成员)时, 谓语动词则用复数。这一类常见的集合名词有class, family, team, group, crowd, army, enemy, police, couple, audience, government, population, the public等。另外，集合名词people, cattle 作主语时，谓语动词用复数。如：
(1) The family is (be) very big.
(2) The family are (be) very early risers.
(3) This class has (have) eighteen girls and twenty-five boys.
(4) This class are (be) very bright especially in science subjects.
(5) The government were (be) having an important meeting when I got there.
(6) The government is (be) planning further cuts in income tax.
(7) The army is (is/are) going to remain in this town.
(8) The army have (has/have) rescued the miners trapped under the ruins.
(9) The police is (be) an organization which protects (protect) the public from harm.
(10) The police are (be) people who catch (catch) thieves and robbers.
(11) The couple were/was (be) married in 2006.
(12) The audience seem/seems (seem) to have enjoyed the concert.
(13) The public are/is (be) very excited now that the concert hall is completed.
(14) The population of China is (be) very large and more than half of the population live (live)
in rural areas.
(15) In the distance, people are (is/are) working in the field and cattle are (is/are) grazing (吃草)
on the hillside.
3. 某些单复数同形的名词如means, species, series, sheep, deer, fish等作主语时，谓语动词的单复数可
根据名词前的修饰语、限定词或上下文来判定。如：
(1) Every means has (has/have) / All means have (has/have) been tried, but in vain.
(2) There is (is/are) a new species of whale hiding in our ocean.
(3) There are (is/are) many species of dogs in the animal world.
(4) There is (is/are) a deer / are (is/are) two sheep under the tree. / There are (is/are) several
fish in the tank.
4. 某些以-s结尾的名词不表示复数而表达单数概念，如学科名词maths, physics, politics，书报名the
Times，国名the United States或组织名称the United Nations，以及不可数名词news, plastics等，这类名词作主语时谓语动词用单数；但是，the Olympics / Olympic Games作主语时谓语动词常用复数。如：
