What is article in parts of speech and tense

Bonjour Salsabil,

This is an extensive subject within French grammar and not readily answered within a Forum context.

You will need to acquire a good grammar reference source to study this aspect of French grammar. There are definite, indefinite and partitive articles each category requiring a thorough understanding.

To give you an idea of what is involved, try this link:- https://www.lawlessfrench.com/grammar/articles/

Bonne continuation

Jim