You, what are you doing?

That person is my friend.

It is important for each person to fulfill their role.

Learning about the culture of specific Asia is very interesting.

Abstract nouns, unlike nouns that refer to concrete things, refer to concepts or states that do not have a specific shape or color.

He is learning how to use gerunds.

What is his real name?

'Apple' is a count noun, and you can count it as one, two, etc.

Compound nouns are a very important part of Japanese grammar.

A common noun refers to a noun that does not point to a specific person or thing.