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Negation
Negatives
The word not is used with do to make a verb negative, as in I don't have any money (don't = do not). No is used as an adjective in front of a noun, as in I have no money. Both of these examples are acceptable ways of expressing the idea that you do not have something.
Note these contracted negative forms with do:
I don't
you don't
he, she doesn't
they don't
we don't
Here are some affirmative words and their negative forms in English:
AFFIRMATIVES
someone, anybody
something, anything
still
ever
either... or
NEGATIVES
no one, nobody
nothing
no longer
never
neither... nor

Avoid using more than one negative in a clause:
--I don't have any money.
NOT: I don't have no money.
--They don't see anybody.
NOT: They don't see nobody.
--I didn't do anything.
NOT: I didn't do nothing.

Nouns
Count And Noncount Nouns
Count nouns are nouns that can be counted (e.g., a book, two friends, three cars, etc.). A count noun may be preceded by a or an in the singular; it takes a final -s or -es in the plural.
Noncount (or mass) nouns refer to things that cannot be counted (e.g., money, rain, snow, butter, wind, air, clothing, etc.). Noncount nouns are not preceded by a or an and have no plural form.
COMMON NONCOUNT NOUNS

advice weather equipment
news water jewelry
information music postage
work money luggage
Some nouns can be both count and noncount nouns:
--We drank some wine. (Noncount)
--We ordered three wines. (Count)
(It is implicit that three different wines were ordered.)
Irregular Noun Plurals
When the final -y is preceded by a consonant, change the -y to -i and add -es:
baby-->babies
lady-->ladies
If a noun ends in -fe or -f, the ending is changed to -ves (except: beliefs, chiefs, roofs, staffs).
life-->lives
thief-->thieves
Add -es to nouns ending in -sh, -ch, -s, -z, and -x. (Exceptions: monarchs, stomachs.)
wish-->wishes
class-->classes
Both the -s and -es spellings are accepted for nouns ending in -o.
tomato-->tomatoes
hero-->heroes
The plural possessive form of these nouns is also irregular.
child-->children
foot-->feet
goose-->geese
man-->men
tooth-->teeth
The plural is the same as the singular for these nouns.
deer-->deer
fish-->fish
sheep-->sheep
species-->species
The final sound of these plurals is pronounced like the word sees.
crisis-->crises
thesis-->theses

Singular and Plural Forms of Nouns
All English nouns are either singular or plural. Most words form the plural by adding an -s to the end of the singular form:
month-->months
visa-->visas
airport-->airports
Other words, already referring to more than one person or thing, do not normally add an -s.
--the people, the fish, the mice, etc.