1) ‘Some nouns always remain in plural form’—–‘Take plural verb’.
EX: Assets, alms, amends, annals, archives, ashes, arrears, auspices, species, scissors, trousers, pants, etc.
2) ‘Some nouns are plural in form but have singular meaning’—-‘Take singular verb’
EX: News, innings, politics, summons, physics, economics, ethics, mechanics, mathematics, measles, mumps. etc.
3) ‘Some nouns look singular but have plural meaning’—-‘Take plural verbs’.
EX: Cattle, clergy, cavalry, infantry, poultry, peasantry, children, gentry, police.
4) ‘Some nouns are always used in singular’ —- ‘Not plural’. (i.e) Sceneries, furnitures (In correct).
EX: Scenery, poetry, furniture, advice, information, language, business, mischief, bread, stationery, crockery, luggage, baggage, postage, knowledge, wastage, money, jewellery, breakage. etc.
5) ‘Some nouns have the same form in singular as well as in plural’.
EX: Deer, fish, crew, family, team, jury, carp, pike, trout, aircraft, counsel, swine, vermin, etc.
6) ‘If a definite numeral adjective is used before noun they are not pluralised’.
EX: A Pair of dove, A Two hundred rupee note.
‘If an indefinite numeral adjective is used before noun they are pluralised’.
EX: Dozens of women, Hundreds of people.
7) ‘If the same noun is repeated after preposition’—-‘the noun will be singular’.
EX: Town after town, Row upon row.
8) Hyphenated nouns generally do not have plural form (Except a few).
Ex: With hyphens: We have a two-year-old child. (Year is singular)
No hyphens: The child is two years old. (Years are plural)
Exceptions cases: Mother – in – law, Mothers – in – law.
9) ‘Some nouns are known as common gender nouns’—- ‘They can be used for either sex’.
Ex: Teacher, student, child, clerk, candidate, advocate, worker, writer, author, leader.
10) Adjective used with These Two categories of Nouns
Countable nouns take before them adjective of numbers-two, ten, hundred. etc. Adjective of quantity-many, several, few. etc.
Uncountable nouns take before them adjectives which do not denote quantity or number- little, some, no, a lot, much. etc.
Indefinite article ‘a’ and ‘an’ can be used generally with countable nouns.
11) In animate noun- ‘apostrophe’ is not used.
Ex: Car’s glass[incorrect], glass of the car[correct]