Nouns:

1-Gender :

 

Nouns do not have grammatical gender in English. To show gender in job nouns we have to say a female / a woman doctor, a male doctor 

, etc. A few nouns show their gender by their suffix, usually masculine gender, such as businessman . A lot  of people avoid these nouns now, especially if referring to a woman, and prefer a form with no obvious gender, e.g. chair, or to match the suffix to the person, e.g. chairwoman :

That's the view of Sheila Davison, chair(woman) of the Institute of Public Relations.

2- Nouns ending in -s :

Some uncountable nouns end in -s but take a singular verb, for example

Some illnesses : measles, mumps 

Sport and games : aerobics, gymnastics, darts 

 Study/abstract ideas/emotions :mathematics, politics, news, thanks, happiness

Politics is a topic best avoided with people you don't know well.

     A plural subject describing a specific measurement usually takes a singular verb :

    Two metres aren't particularly tall these days. 

    Two metres isn't particularly tall these days .

A few nouns are common in the plural form and take a plural verb, e.g. goods, whereabouts, remains, stairs, proceeds:

The auction raised a lot of money and the proceeds were given to a children's charity.

Some nouns refer to one object divided into two parts and take a plural verb, e.g. glasses, jeans, pyjamas, scales, scissors, spectacles, trousers :

Special scissors are used to cut this fabric.

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