Here are some examples:
Definite Articles:
* The book is on the table. (Refers to a specific book)
* The cat chased the mouse. (Refers to specific cat and mouse)
* The sun is shining. (Refers to a specific sun)
Indefinite Articles:
* I have a cat. (Refers to any cat)
* I bought an apple. (Refers to any apple)
* I saw a bird flying. (Refers to any bird)
Key Points:
* Definite articles ("the") are used when the noun is already known or specific.
* Indefinite articles ("a", "an") are used when the noun is not specific or is being introduced for the first time.
Note: The article "an" is used before words that start with a vowel sound (e.g., "an apple," "an hour").
There are also no articles in some cases, such as when referring to general, abstract nouns:
* Love is a powerful emotion.
* Happiness is a state of mind.
Let me know if you have any other questions!