sangchurang baechureul gati sa wassneunde sangchuneun oneul saelleodeuro meogeul geoya.

In Korean, when two nouns are joined with 랑 meaning and/with, it is very common for only the last noun to take the case particle.

So:

• 상추랑 배추를 = lettuce and cabbage
  • object marker on the whole phrase

This works like saying:

• [상추랑 배추]를 같이 사 왔는데
• As for lettuce and cabbage, I bought them together and brought them back...

You could think of 를 as applying to the entire combined object phrase, not just to 배추 by itself.

Here, -랑 means and.

So:

• 상추랑 배추 = lettuce and cabbage

It is a very common, natural, conversational connector between nouns.

Comparison:

• -랑: casual, spoken
• -하고: also common and conversational
• 와/과: more formal or written

So all of these could work:

• 상추랑 배추를
• 상추하고 배추를
• 상추와 배추를

In this sentence, -랑 gives it a natural everyday tone.

같이 usually means together.

In this sentence, 같이 사 왔는데 means that the speaker bought both items together / at the same time.

So the sense is:

• I bought lettuce and cabbage together and brought them back

It does not mean that the speaker bought them with someone else here. It is about the two items being bought together.

사 왔는데 is made from:

• 사다 = to buy
• 오다 = to come

When combined like this, it means something like:

• bought and brought back
• went and bought, then came back
• have bought and brought here

So 사 오다 is a very common Korean pattern where the first verb describes the action, and 오다 adds the idea of movement toward the speaker’s current place or situation.

Examples:

• 커피를 사 왔어. = I bought coffee and brought it back.
• 빵을 사 왔어. = I bought bread and brought it back.

In your sentence, it suggests the vegetables were purchased and brought home (or to the current place).

-는데 often connects one clause to the next and gives a sense of:

• background information
• setting the scene
• contrast
• leading into another statement

Here:

• 상추랑 배추를 같이 사 왔는데 = I bought lettuce and cabbage together, and/as for...

It leads naturally into the next part:

• 상추는 오늘 샐러드로 먹을 거야 = as for the lettuce, we’re going to eat it as a salad today

There is also a slight contrastive feeling:

• I bought both lettuce and cabbage, but/as for the lettuce, we’ll eat it today as a salad

This can imply that the cabbage may be used differently or later, even though that part is not said directly.

는 is the topic marker, and here it gives a strong as for lettuce feeling.

So:

• 상추는 오늘 샐러드로 먹을 거야 = As for the lettuce, we’re going to eat it as a salad today

Why not 상추를?

Because the sentence is not just saying lettuce is the object. It is highlighting lettuce as the topic or contrast among the things that were bought.

This creates a contrast like:

• I bought lettuce and cabbage together. As for the lettuce, we’ll eat it today as a salad.

That often implies:

• maybe the cabbage is for something else
• maybe the cabbage will be eaten later

So 는 is doing important discourse work here, not just marking grammar.

In 샐러드로 먹다, the particle -로 means something like:

• as
• in the form of
• made into

So:

• 샐러드로 먹다 = eat as a salad = have it in salad form

It does not mean eat at the salad or anything like that.

Other similar examples:

• 김치로 먹다 = eat it as kimchi / prepared as kimchi
• 국으로 먹다 = eat it as soup
• 반찬으로 먹다 = eat it as a side dish

So the sentence means the lettuce will be used for a salad, not just eaten plain.

Yes. 먹을 거야 is a very common way to express a future action, plan, or intention in casual speech.

It comes from:

• 먹다 = to eat
• 먹을 거야 = will eat / going to eat

In context, it sounds like:

• We’re going to eat the lettuce as a salad today
• I’m planning to eat the lettuce as a salad today

This form is very natural in conversation.

Tone comparison:

• 먹을 거야 = casual, natural
• 먹을 거예요 = polite
• 먹겠다 = stronger intention or determination, depending on context

So 먹을 거야 fits a normal everyday spoken sentence very well.

The subject is omitted because Korean often leaves out information that is already understood from context.

Possible implied subjects are things like:

• I
• we

Depending on the situation, the sentence could mean:

• I bought lettuce and cabbage together, and as for the lettuce, I’m going to eat it as a salad today.
• We bought lettuce and cabbage together, and as for the lettuce, we’re going to eat it as a salad today.

Korean does this very often. If the speaker and situation are clear, the subject does not need to be stated.

Yes, Korean word order is flexible as long as the particles and meaning stay clear.

The original order:

• 오늘 샐러드로 먹을 거야 puts today before as a salad, which sounds natural.

You could also say:

• 샐러드로 오늘 먹을 거야
• 오늘은 샐러드로 먹을 거야

These can sound slightly different in emphasis.

For example:

• 오늘 샐러드로 먹을 거야 = neutral
• 오늘은 샐러드로 먹을 거야 = as for today, we’ll eat it as a salad
• 샐러드로 먹을 거야 = emphasis on the form/preparation

So the original sentence uses a very natural conversational order, but other orders are possible depending on what the speaker wants to stress.

Yes. The sentence strongly suggests a contrast between the two vegetables.

Because it says:

• I bought lettuce and cabbage together and then
• as for the lettuce, we’ll eat it today as a salad

the listener may naturally infer:

• the cabbage is probably not being eaten today
• or the cabbage will be used for something else
• or the speaker is only explaining the plan for the lettuce right now

This kind of implication is very common in Korean, especially when -는데 and 는 are used together. The sentence does not explicitly say what will happen to the cabbage, but it gently invites that comparison.