Explanation

• I saw a thousand rupees note under the chair
• ****
• "A" indefinite article
• The indefinite article (a, an) is used before a noun that is general or when its identity is not known. 
• a/an is used to modify non-specific or non-particular nouns.
  
  

Explanation

“The” is typically used in accompaniment with any noun with a specific meaning, or a noun referring to a single thing.

Explanation

English has two articles: the and a/an.

The is used to refer to specific or particular nouns; a/an is used to modify non-specific or non-particular nouns.

We call the the definite article and a/an the indefinite article.

For example, if I say, "Let's read the book," I mean a specific book.

Explanation

Cell gives consonant sound.

We use a when there is consonant sound.

A is an article here.

I will buy a cell phone next week.

.میں اگلے ہفتے ایک سیل فون خریدوں گا

Explanation

Here this sentence is talking about a particular book.

We use the before a particular thing.

The is an article here. 

I enjoyed reading the book you gave me.

Explanation

Articles "A" and "AN" are used with some expressions.

For example:

Make a noise, give a warning, have a pain, have a great education, an opportunity etc.

Explanation

We use Articles A & An before professions.

Doctor gives consonant sound. Therefore, He is a doctor۔  I am a student. She is a teacher. 

کسی کا شعبہ یا فیلڈ بتانے کیلئے ہم (ارٹیکل اے) کا استعمال کرتے ہیں۔

We use an when the profession gives vowel sound.

e.g. She is an actress. You are an actor. I am an author.

Explanation

Money is important but I can't buy happiness.

پیسا اہم ہے لیکن میں اس سے خوشی نہیں خرید سکتا ہوں۔

No article required here

Explanation

She wants to buy an apartment.

Apartment gives vowel sound.

We use an when there is vowel sound.

We use a when there is consonant sound.

A & An are articles. 

Explanation

Car gives consonant sound.

We use a before car.

A is an article.

I wanted to buy a car.

میں ایک کار خریدنا چاہتا تھا۔