beranda-e hwabuneul dueossdeoni achimmada haesbichi jal deureowayo.

In this sentence, -더니 connects two events and often gives the sense of:

• after doing X, I found that Y happened
• when/after X happened, Y was the result
• sometimes because of X, Y happened

So 화분을 두었더니 아침마다 햇빛이 잘 들어와요 suggests something like:

• After I put the flower pot there, I noticed that sunlight comes in well every morning
• or I put the flower pot there, and as a result, sunlight comes in well every morning

It often carries a nuance of discovery from experience or observation.

Both are related to the verb 두다.

• 두었다 is the full form
• 뒀다 is the contracted spoken form

So:

• 두었더니 = full form
• 뒀더니 = contracted form

Both are natural in speech, but 두었더니 can sound a bit clearer or slightly more careful in style. A learner will often see both.

Here, 두다 means to put/place something somewhere and leave it there.

So 화분을 두다 means:

• to place a flower pot somewhere
• with a nuance that it remains there

놓다 can also mean to put/place, and in many situations the two are similar. But 두다 often emphasizes that something is set there and kept there. That fits well with a flower pot, since you put it somewhere and leave it.

So 화분을 두었더니 sounds very natural.

The particle 에 is used because 베란다 is the place where the flower pot is placed.

In this sentence:

• 베란다에 = on/in the veranda/balanda
• 화분을 두다 = to put the flower pot

So 에 marks the location/destination of the placement.

A simple way to think about it:

• 어디에 두다? = put it where?
• 베란다에 두다 = put it on the veranda

Because 화분 is the object of 두다.

• 화분을 두다 = to place a flower pot

The thing being placed is the direct object, so it takes 을/를.

Here:

• 화분 ends in a consonant, so it becomes 화분을

Because 햇빛 is the subject of the verb 들어오다.

• 햇빛이 들어오다 = sunlight comes in

The sunlight is not being acted on; it is the thing that comes in. That is why it takes 이/가, not 을/를.

So the structure is:

• 베란다에 화분을 두었더니 = after putting the flower pot on the veranda
• 햇빛이 잘 들어와요 = sunlight comes in well

들어와요 comes from 들어오다, which means to come in / to enter.

It is made of:

• 들다
  • 오다 in its historical formation, but learners should usually just memorize 들어오다 as one verb
• polite present form: 들어와요

So:

• 햇빛이 들어와요 = sunlight comes in

This is a very common verb for things like light, air, people, or sounds entering a space.

Yes, 잘 often means well, but in Korean it is used more broadly than English well.

In 햇빛이 잘 들어와요, 잘 means something like:

• nicely
• easily
• plenty
• in a good way

So the sentence means that sunlight comes in well, meaning a lot of sunlight comes in or the sunlight enters nicely.

This is a very natural use of 잘 in Korean.

아침마다 means every morning.

It is:

• 아침 = morning
• -마다 = every, each

So:

• 아침마다 = every morning
• 아침에 = in the morning

The difference is:

• 아침에 just gives the time
• 아침마다 emphasizes repetition: each morning, every morning

So this sentence is not about one morning only. It says this happens repeatedly.

Not literally in a strict physical sense. The sentence sounds more like the speaker is describing a situation they noticed after placing the flower pot on the veranda.

With -더니, the feeling is often:

• I did this, and then I noticed this situation/result
• after that, it turns out that...

So the sentence may suggest a loose connection or simply a discovered result, not necessarily a precise scientific cause-and-effect statement.

Because the two parts describe different times:

• 두었더니 refers to the earlier completed action: I put/placed it
• 들어와요 describes the current repeated situation: sunlight comes in every morning

So the sentence means:

• first, the speaker placed the flower pot
• now, as a continuing result or observation, sunlight comes in well every morning

This mix of past and present is very natural in Korean.

Yes. 베란다 is a very common loanword in Korean, from veranda. In everyday Korean, it often refers to a balcony-like space attached to an apartment or house.

So although the English source word is recognizable, its exact use in Korean may match what Korean speakers commonly call a home balcony/veranda area.

Yes, that would also be natural.

• 놨더니 comes from 놓다
• 화분을 놨더니 = after I put the flower pot there

Compared with 두었더니, the nuance is slightly different, but in everyday speech both can work here. For many learners, the important point is that both verbs can mean to put/place, though 두다 often has a stronger sense of put and leave there.

It breaks down like this:

• 베란다에 = on/in the veranda
• 화분을 = the flower pot
• 두었더니 = after I placed it / when I had placed it
• 아침마다 = every morning
• 햇빛이 = sunlight
• 잘 들어와요 = comes in well

So the pattern is roughly:

[place + object + past action + -더니] [time expression + subject + present/result]

That is a very common Korean sentence pattern for describing a result or discovered situation.