Singular or plural.

These words are plural, so they take a plural verb:

• My trousers are too long, (not 'is too long')

You can also use a pair of + these words:

• Those are nice jeans, or That's a nice pair of jeans, (not 'a nice jeans')

• I need some new glasses, or I need a new pair of glasses.

B/ Some nouns end in -ics but are not usually plural. For example: 

athletics/ gymnastics/ mathematics (or maths)/ physics/ electronics/ economics/ politics

• Gymnastics is my favourite sport.

News is not plural.

• What time is the news on television? (not 'are the news')

Some words ending in -s can be singular or plural. For example:
means ==> a means of transport ==> many means of transport
series ==> a television series ==> two television series
species ==> a species of bird ==>  200 species of bird

C/ Some singular nouns are often used with a plural verb. For example:

government/ staff/ team/ family/ audience/ committee/ company/ firm

These nouns are all groups of people. We often think of them as a number of people (= 'they'), not as one thing (= 'it'). So we often use a plural verb:

• The government (= they) want to increase taxes.

• The staff at the school (= they) are not happy with their new working conditions.

In the same way, we often use a plural verb after the name of a sports team or a company:

• Scotland are playing France next week (in a football match).

• Shell have increased the price of petrol.

A singular verb (The government wants... / Shell has... etc.) is also possible.

We always use a plural verb with police:

• The police have arrested a friend of mine, (not 'The police has')

• Do you think the police are well-paid?

Note that a person in the police is 'a policeman / a policewoman / a police officer' (not 'a police').

D/ We do not often use the plural of person ('persons'). We normally use people (a plural word):

• He's a nice person,    but    They are nice people.

• Many people don't have enough to eat. (not 'doesn't have')

E/ We think of a sum of money, a period of time, a distance etc. as one thing. So we use a singular verb:

• Twenty thousand pounds (= it) was stolen in the robbery, (not 'were stolen')

• Three years (=it) is a long time to be without a job. (not 'Three years are...)

• Six miles is a long way to walk every day

Choose the correct form of the verb, singular or plural.