jeomsime gamjarang ppangeul gati meogeoseo beolsseo baebulleo.

점심에 uses 에 to mark a time: at lunch / at lunchtime.

The sentence is saying when the action happened. The actual thing being eaten is 감자랑 빵.

• 점심에 = at lunch
• 점심을 먹다 = to eat lunch

So here, 점심에 sets the time, while 감자랑 빵을 is the object.

-랑 means and or with in casual speech.

So:

• 감자랑 빵 = potatoes and bread

It is a very common spoken connector. Other similar forms are:

• 이랑 after a consonant
• 하고
• 와/과 for a more neutral or written feel

Examples:

• 친구랑 = with my friend
• 사과랑 바나나 = apples and bananas

Because 감자 ends in a vowel, 랑 is used.

In Korean, when two nouns are joined into one list, the object marker often goes only on the final noun.

So:

• 감자랑 빵을 먹다 = eat potatoes and bread

Here, 감자랑 빵 works as one combined object phrase, and 을 is attached at the end of that whole phrase.

You could think of it as:

• [감자랑 빵]을 먹다

This is very natural Korean.

It can mean either. Korean nouns usually do not have to show singular vs. plural.

So 감자 could be:

• a potato
• potatoes

The exact number comes from context, not from the noun form itself. English forces you to choose singular or plural, but Korean often does not.

The same is true for many nouns:

• 사과 = apple / apples
• 학생 = student / students

같이 means together.

In this sentence, it means the speaker ate the potatoes and bread together, as part of the same meal.

So 감자랑 빵을 같이 먹어서 is like:

• because I ate potatoes and bread together

Here 같이 does not necessarily mean with another person. It is about eating the foods together.

먹어서 is 먹다 + -아서/어서.

The ending -아서/어서 often connects two clauses and can mean:

• because
• and so
• sometimes just a natural sequence

In this sentence, it most naturally gives a reason/result meaning:

• 먹어서 벌써 배불러
• because I ate ..., I’m already full

So 먹어서 links the eating to the result of being full.

Both can connect clauses, but they do not feel exactly the same.

• 먹고 = and / and then ate
• 먹어서 = because I ate / having eaten, so...

Since the second part is 벌써 배불러, the sentence is emphasizing a result: eating those foods led to being full.

So:

• 감자랑 빵을 같이 먹고 벌써 배불러 sounds more like simple sequencing
• 감자랑 빵을 같이 먹어서 벌써 배불러 clearly shows cause and result

That makes 먹어서 the better choice here.

벌써 means already.

It often suggests that something happened sooner than expected or earlier than you might think.

So 벌써 배불러 means:

• I’m already full
• I’m full already

It gives a little feeling of surprise, emphasis, or quickness.

The dictionary form is 배부르다, which means to be full after eating.

So:

• 배부르다 = dictionary form
• 배불러 = casual present form
• 배불러요 = polite present form

This change happens because 배부르다 follows the 르 irregular pattern:

• 배부르다 → 배불러

That is why it is 배불러, not 배부르어.

You may also hear 배가 불러, but 배부르다 / 배불러 is the standard form learners should know well.

Korean often leaves out the subject when it is obvious from context.

Here, the natural understood subject is I, because the speaker is talking about being full.

So the sentence effectively means:

• I’m already full because I ate potatoes and bread together at lunch

But Korean does not need to say 저는 unless it is useful for contrast, emphasis, or clarity.

This kind of omission is very common in everyday Korean.

Yes. The final form 배불러 is casual speech.

A polite version would be:

• 점심에 감자랑 빵을 같이 먹어서 벌써 배불러요.

A slightly more formal or written-sounding version could be:

• 점심에 감자와 빵을 같이 먹어서 벌써 배부릅니다.

So the original sentence is something you might say to a friend or someone you speak casually with.