hoeui jeone gwaja hanarang ppang jogeum meogeossdeoni aju deundeunhaesseo.

전에 means before, and it comes after a noun.

• 회의 전에 = before the meeting
• 수업 전에 = before class
• 점심 전에 = before lunch

This is the normal pattern:

• noun + 전에 = before noun

If you want to say before doing something, you usually use:

• verb stem + 기 전에

For example:

• 먹기 전에 = before eating
• 회의하기 전에 = before having the meeting

So 회의 전에 is natural because 회의 is a noun.

Both are possible.

• 과자 하나
• 과자 한 개

In casual spoken Korean, 하나, 둘, 셋 are often used by themselves as general counters, especially when the context is clear.

So 과자 하나 means something like:

• one snack
• one cookie/cracker
• one piece/package of snacks

The exact unit depends on context.

한 개 is a little more explicit because 개 is the general counter for things. But 하나 by itself is very common in everyday speech.

랑 is a casual particle that usually means and or with.

Here it means and, linking the two things eaten:

• 과자 하나랑 빵 조금 = one snack and a little bread

This is the casual spoken form of (이)랑:

• after a vowel: 랑
• after a consonant: 이랑

Since 하나 ends in a vowel, it becomes 하나랑.

Other similar ways to say and are:

• 하고 — casual/common
• 와/과 — more formal or written

So these are similar:

• 과자 하나랑 빵 조금
• 과자 하나하고 빵 조금
• 과자 하나와 빵 조금

In Korean, amount words like 조금 often come after the noun in expressions like this:

• 물 조금 = a little water
• 밥 조금 = a little rice/meal
• 빵 조금 = a little bread

So 빵 조금 먹었어 is a very natural spoken way to say I ate a little bread.

You can also say:

• 빵을 조금 먹었어

This is also correct and may feel a bit more structurally complete.

But 조금 빵 is not the normal word order here.

Because this is natural conversational Korean. Object particles are often omitted when the meaning is already clear.

So:

• 과자 하나랑 빵 조금 먹었더니 is a casual, natural spoken sentence.

A fuller version could be:

• 과자 하나랑 빵 조금을 먹었더니 or
• 과자 하나와 빵을 조금 먹었더니

But in everyday speech, leaving out 을/를 is extremely common.

This sentence already sounds casual because of:

• 랑
• omitted particles
• final 했어 instead of 했어요

-았/었더니 is a very common grammar pattern that means something like:

• when/after I did X, Y happened
• I did X, and then I found that Y
• because I did X, the result was Y

So:

• 먹었더니 아주 든든했어 means roughly:
• After I ate, I felt really full/satisfied
• I ate, and it turned out I felt quite full

This grammar often carries a sense of result or realization.

It is not just two actions in sequence. It suggests:

1. the eating happened first,
2. then the speaker experienced the result.

This is a very common learner question.

먹어서

This usually gives a straightforward cause/reason:

• 먹어서 배불렀어 = I was full because I ate.

먹었더니

This often emphasizes the result or the speaker’s realization after doing something:

• 먹었더니 아주 든든했어 = I ate, and then I found I felt really satisfied/full.

So -아서/어서 is more neutral cause-and-effect, while -더니 often feels more like:

• after doing it
• it turned out that
• I realized that

In this sentence, 먹었더니 works well because it sounds like the speaker noticed the result after eating.

Not exactly. 든든하다 is a little richer than just full.

With food, 든든하다 means something like:

• comfortably full
• satisfied
• feeling sustained
• feeling like you have enough energy from what you ate

So 아주 든든했어 is more like:

• I felt really satisfied
• It was quite filling
• I felt nicely full

It usually has a positive nuance. It is not the same as being overly stuffed.

For example:

• 배불러 = I’m full
• 든든해 = I feel satisfyingly full / well fed / fueled up

아주 means very or quite.

So:

• 든든했어 = I felt satisfied/full
• 아주 든든했어 = I felt very satisfied/full

It strengthens the description.

In everyday speech, people also use words like:

• 정말
• 되게
• 엄청

But 아주 is perfectly natural and straightforward.

했어 is the casual, informal ending.

So this sentence is in 반말 style, used with:

• close friends
• younger people
• people you are comfortable with
• informal narration

A polite version would be:

• 회의 전에 과자 하나랑 빵 조금 먹었더니 아주 든든했어요.

The meaning is the same, but 했어요 is more polite.

It can connect bigger noun phrases too.

Here, 랑 is not just linking 과자 and 빵. It is linking:

• 과자 하나 and
• 빵 조금

So the structure is:

• [과자 하나]랑 [빵 조금] 먹었더니

That is why the sentence means I ate one snack and a little bread, not something strange like one with a snack.

This kind of linking is very common in Korean.