syawohal ttae meorireul gamayo.

샤워할 때 means when taking a shower or while showering.

It comes from:

• 샤워하다 = to shower / to take a shower
• -ㄹ/을 때 = when, at the time of doing

Because the verb is 하다, it changes to 할 때. So:

• 샤워하다 → 샤워할 때

This pattern is very common:

• 공부할 때 = when studying
• 운동할 때 = when exercising

That is normal Korean word order. Korean often puts background information such as time, place, or situation before the main action.

So the sentence is structured like:

• 샤워할 때 = when I shower
• 머리를 감아요 = I wash my hair

Also, Korean verbs usually come at the end of the sentence, so the main action 감아요 naturally appears last.

-를 is the object particle. It marks 머리 as the thing being washed.

So:

• 머리 = head / hair
• 머리를 = the hair (as the object)

In Korean, body parts are often marked directly as objects:

• 이를 닦아요 = brush teeth
• 얼굴을 씻어요 = wash one’s face
• 손을 씻어요 = wash one’s hands

So 머리를 감아요 is the normal way to say wash one’s hair.

Korean often leaves out possessives like my, your, or his/her when they are obvious from context, especially with body parts.

So instead of saying:

• 내 머리를 감아요

Korean usually just says:

• 머리를 감아요

The listener naturally understands whose hair it is. This is very common in Korean and sounds more natural than constantly using possessives.

By itself, 머리 can mean head or hair, depending on context.

But in the expression 머리를 감다, it means hair. So this sentence means to wash one’s hair, not literally to wash one’s head.

This is one of those expressions that you learn as a set phrase:

• 머리를 감다 = wash one’s hair

Korean normally uses 감다 for washing hair.

So:

• 머리를 감아요 = wash hair

Even though 씻다 means to wash in a general sense, 머리를 씻어요 is not the usual everyday expression for washing hair. Native speakers normally say 머리를 감아요.

A useful comparison:

• 얼굴을 씻어요 = wash one’s face
• 손을 씻어요 = wash one’s hands
• 머리를 감아요 = wash one’s hair

감아요 is in the present tense informal polite style, often called the 해요-style.

So it is polite and natural for everyday conversation.

In Korean, the present tense often expresses:

• a habitual action
• a general fact
• something someone normally does

So this sentence most naturally sounds like a habit:

• I wash my hair when I shower

It does not have to mean that the action is happening right this second.

The subject is omitted because it is understood from context. Korean very often leaves out subjects when they are obvious.

So this sentence could imply:

• 저는 샤워할 때 머리를 감아요 = I wash my hair when I shower
• 그는 샤워할 때 머리를 감아요 = He washes his hair when he showers

Without more context, the subject is simply unstated. This is completely normal in Korean.

It can feel like any of those in English, depending on context.

In this sentence, it most naturally gives a habitual meaning, so whenever I shower or when I shower is a good match.

It can also feel like while showering, because the action happens during that time. English translations may differ slightly, but the Korean is natural for all of those ideas.

Adding -는 gives 때 a topic or contrast feeling.

• 샤워할 때 머리를 감아요 = I wash my hair when I shower.
• 샤워할 때는 머리를 감아요 = When I shower, I do wash my hair. / As for when I shower, I wash my hair.

The version with 는 can sound a little more contrastive, as if you are comparing it with another situation:

• 샤워할 때는 머리를 감아요. 그런데 아침에 세수할 때는 안 감아요.
• When I shower, I wash my hair. But when I wash my face in the morning, I don’t.

So the basic meaning stays the same, but 는 can add emphasis or contrast.