Difference between 많다, 많은 & 많이? How do you ask about a Difference in Korean?
I'm slightly confused about which one to use when and where.

Also how would you ask "What is the difference between A and B?" in Korean?

Thank you

Question

Difference between 많다, 많은 & 많이? How do you ask about a Difference in Korean?
I'm slightly confused about which one to use when and where.

Also how would you ask "What is the difference between A and B?" in Korean?

Thank you

Answer

많다 is not suitable for explaining of such differences.

I will take for example 깨끗하다(clean)

깨끗하다 : the predicative use of adjective
그 방은 깨끗하다 The room is clean.

깨끗한 : the predicative use of adjective
깨끗한 방이 하나 있다. There is a clean room.

깨끗이 : adverb
그는 방을 깨끗이 유지했다. He kept the room cleanly.

많다 : the predicative use of adjective
상자에 사과가 많다 There are many apples in a box.

많은 : the predicative use of adjective
상자에 많은 사과가 있다 There are many apples in a box.

많이 : adverb
상자에 사과가 많이 있다 There are many apples in a box.

What is the difference between A and B?
A와 B은/는 어떤 차이가 있습니까? or
A와 B의 차이가 무엇입니까?