Definite Articles
Indefinite articles
An is used when the word starts with a vowel sound
He caught an eel in his bare hands.
He was killed by an animal.
No Articles:
Generalisations with plural nouns
Example: Lemons grow on trees.
No article before abstract nouns.
Most proper nouns do not need an article.
Spain is hot.
Exceptions:
When it’s made up of other parts.
Examples: The United States, The United Kingdom
Oceans: The Atlantic Ocean lies
Oceans