bangeul cheongsohamyeon kkaekkeushaejyeoyo.

-면 is a conditional ending. It means if or when, depending on context.

• 청소하다 = to clean
• 청소하면 = if/when someone cleans

So this first part sets up the condition for what happens next.

을/를 marks the direct object, meaning the thing that receives the action.

Here, 방을 청소하다 means to clean the room. The room is what is being cleaned, so it takes 을.

• 방 ends in a consonant, so it uses 을
• If a noun ended in a vowel, it would use 를

Because in this sentence, 청소하다 is functioning as the verb to clean.

So the structure is:

• 방을 = the room
• 청소하면 = if/when one cleans

The object marker goes on 방, not on 청소.

You can also see 청소를 하다 in Korean, where 청소 is treated more clearly as a noun meaning cleaning, and 하다 means do. But in 방을 청소하다, the whole expression works naturally as clean the room.

Historically and structurally, it is 청소 + 하다:

• 청소 = cleaning
• 하다 = to do

But for learners, it is often easiest to treat 청소하다 as a verb meaning to clean.

Many Korean verbs work this way:

• 공부하다 = to study
• 운동하다 = to exercise
• 청소하다 = to clean

So it is both useful to know the pieces and useful to recognize it as one common verb expression.

깨끗해져요 comes from:

• 깨끗하다 = to be clean
• 깨끗해지다 = to become clean
• 깨끗해져요 = becomes clean / gets clean

The key grammar point is -아/어지다, which means to become or to get.

So:

• 깨끗해요 = it is clean
• 깨끗해져요 = it becomes clean

This is an important difference:

• 깨끗해요 = it is clean
• 깨끗해져요 = it becomes clean / it gets clean

So 깨끗해요 describes a state, while 깨끗해져요 describes a change into that state.

In this sentence, the idea is not just that the room is clean, but that cleaning causes it to become clean.

In many textbooks, 깨끗하다 is called an adjective because it describes a quality: clean.

But in Korean grammar, words like this behave a lot like verbs. They conjugate directly:

• 깨끗하다
• 깨끗해요
• 깨끗하면

So English speakers should remember that Korean adjectives often act more like descriptive verbs.

Korean often leaves out subjects when they are obvious from context.

In this sentence, after hearing 방을 청소하면, it is easy to understand that the result is about the room. So 방이 can be omitted.

A fuller version would be:

• 방을 청소하면 방이 깨끗해져요.

That is completely natural too, but the shorter version is smoother because the subject is already understood.

It can mean either, depending on context.

In a sentence like this, it expresses a general result, so English could translate it as either:

• If you clean the room, it gets clean
• When you clean the room, it gets clean

Korean -면 does not always force the same strict difference that English makes between if and when.

Korean often uses the non-past form for general truths, habits, and natural results.

So 깨끗해져요 here does not mean only is becoming clean right now. It can also mean a general fact: cleaning a room leads to it becoming clean.

This is very normal in Korean.

-요 makes the sentence polite. It is the standard everyday polite style.

So:

• 깨끗해져요 = polite
• 깨끗해져 = casual

Learners will see -요 forms very often because they are widely used in conversation with people you are not very close to, or in neutral polite situations.