Define article? How to use article 'a' and 'an' with complete rules with examples.

An article is itself a kind of adjective which is used before a noun to make it definite or indefinite.

1) Definite Article
The
Consonant Sound: The boy
Vocal Sound: The apple

2) Indefinite Article
A

Theory
No signal no train.
No noun o article.

Position of the article

Article + Noun

Article: a boy/pen/fan

Sound

a letter that comes from

Lips + Teeth + Tongue + Body

a + consonant sound like a boy, a pen, a fan

E

Elephant

Vocal sound: an elephant

European

The sound comes from the lips: a European

Word start with w/y

Note:
If a word starts with the help of w or y it takes the article only 'a'.

Example:
a year

Word starting with A/I

Note:
If a word starts with the help of A/I takes the article 'an'.

Example:
an inkpot
an apple

For

Article + Adjective + Noun

Examples:

Aliza is an honest. (Wrong)
Aliza is honest. (Wrong)
Aliza is an honest girl. (Right)

For the Noun

Article + Adverb + Adjective + Noun

Examples:

Aliza is a very good girl.

Basic uses of a/an

Rule 1: Article 'a' is used before singular countable noun which has consonant sound.
Example a boy

Rule 2: Article 'an' is used before singular

countable has a vowel sound.
Example an apple

Rule 3: Article 'a and an' is used before singular countable noun having consonant &

vowel sound.

Rule 4: Not use a/an + PCN (plural countable noun)
Example a boys (Wrong)

Rule 5: Not use a/an + uncountable noun
Example a water (Wrong)

Rule 6: Article 'a/an' is used before the

name profession.
Example: He is a teacher.

Some particular phrases:

in a mood
in a temper
at a loss

Technique

1) Have + a/an + Noun

have a drink
have a bath

2) Take/Make + a/an + Noun

Take a rest.
Take a risk.
Make a mistake.

Rule 9: Such/what/how + a/an + Noun

Such a boy.
What an idea.
How an ugly seen.