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Singular nouns treated as plural nouns
Some singular nouns can be used with either a singular or plural verb. The commonest of these are the collective nouns which stand for a group or collection of people or things. These include words such as audience, committee, crew, family, government, group, team, and many others. So, both these sentences are correct:
✓ The government is doing a good job.
✓ The government are doing a good job.
But you shouldn't switch from singular to plural. For example:
✗ The government is doing a good job. They are responding to the situation effectively.
✗ The government are doing a good job. It is responding to the situation effectively.
These sentences would need to be rewritten as:
✓ The government is doing a good job. It is responding to the situation effectively.
✓ The government are doing a good job. They are responding to the situation effectively.
There are one or two collective nouns that cannot be used with either a singular or a plural verb. The most notable are police and people: both of them must always be used with a plural verb:
✓ By and large the police do a good job.
✗ By and large the police does a good job
✓ People are beginning to ask questions.
✗ People is beginning to ask questions.