baegopeumyeon mwodeunji meokseupnida.

-면 is a conditional ending meaning if or when.

So:

• 배고프다 = to be hungry
• 배고프면 = if/when someone is hungry

In Korean, -면 often covers both ideas that English separates into if and when. Context tells you which sounds more natural.

Good question. Both patterns exist:

• 배고프다 = an adjective meaning to be hungry
• 배가 고프다 = a very common expression, literally the stomach is hungry

So:

• 배고프면 = if/when hungry
• 배가 고프면 = if/when the stomach is hungry → naturally, if/when one is hungry

Both are natural Korean. In this sentence, 배고프면 is just the adjective 배고프다 with -면 attached.

뭐든지 means anything, whatever, or no matter what.

It shows that the speaker is not being picky. In this sentence, it means the person will eat basically any food if they are hungry.

Examples:

• 뭐든지 먹어요. = I eat anything.
• 뭐든지 괜찮아요. = Anything is fine.

Here, -든지 adds the meaning of no matter which/what.

So:

• 뭐 = what
• 뭐든지 = whatever / anything

It gives an it doesn’t matter which one feeling.

A useful note: this is -든지, not -던지.
In this sentence, -든지 is the correct form because it expresses indifference or free choice.

먹습니다 is the formal polite style of 먹다.

So:

• 먹다 = dictionary form, to eat
• 먹어요 = polite, everyday conversational style
• 먹습니다 = more formal polite style

All three relate to the same verb, but the speech level changes.

This sentence could also be said as:

• 배고프면 뭐든지 먹어요.

That would sound more casual and conversational.

Yes. Korean often leaves out the subject when it is already understood from context.

So 배고프면 뭐든지 먹습니다 could mean:

• I eat anything when I’m hungry
• He/She eats anything when hungry
• People eat anything when hungry

Without context, English usually wants a subject, but Korean often does not need to say it.

It can be either, depending on context.

It can describe:

• a habit: When I’m hungry, I eat anything
• a future/likely result: If I get hungry, I’ll eat anything

Korean present-form verbs often cover both general truths and future-like results in conditional sentences.

So 먹습니다 here does not force only one interpretation.

In Korean, object particles are often omitted when the meaning is already clear.

So 뭐든지 먹습니다 is completely natural.

The object is still understood:

• 뭐든지 = anything
• 먹습니다 = eat

Because 뭐든지 already clearly functions as the thing being eaten, Korean does not need to spell the object marking out every time.

Yes, very often.

• 배고프면 뭐든지 먹습니다.
• 배고프면 아무거나 먹습니다.

Both are natural and both can mean If I’m hungry, I eat anything.

A rough nuance:

• 뭐든지 = whatever / anything at all
• 아무거나 = anything / any random thing

In everyday speech, 아무거나 is extremely common.

Yes, it is natural.

It sounds like a general statement about someone not being picky when hungry.

It has a straightforward structure:

• 배고프면 = if/when hungry
• 뭐든지 = anything
• 먹습니다 = eat

So the sentence is simple, natural, and grammatically correct.