Can a noun be both countable and uncountable?

Try putting a number in front of a noun or make it plural. If it works, its countable; if it doesn't, it is probably uncountable.

For example:

Bus: There are fifteen buses in my school. (Correct)

Anxiety: I felt two anxious. (Incorrect as it is uncountable)

Abstract nouns are usually not countable, however, they can be countable in specific contexts.

For example:

·       He had two brilliant ideas.

·       She gave me a piece of information.

Some of the quantifiers that are used with countable nouns include- many, few, a few, several, each, every, some, any.

Examples:

·       There are many buses in the stand.

·       I kept a few chairs in the room.

·       There are several people in the park.

Yes, 'a' or 'an' is used with only singular countable nouns, not plurals.

For instance:

·       A cat is climbing up the tree.

·       There is an apple in the fridge.

·       There is a bus on the road.

Demonstrative pronouns are words used to point toward specific people, objects, or ideas without directly naming them.

Most common ones are this, that, these, and those. They help the speaker or writer indicate whether something is near or far, and whether it is singular or plural. For example, “This is my bag” or “Those are your shoes.” They are widely used in daily communication to bring clarity and emphasis.