i golmogeun jobaseo jadongchaga mos deureogayo.

A natural breakdown is:

• 이 = this
• 골목 = alley / lane
• 은 = topic marker
• 좁아서 = because it is narrow / so it is narrow
  • from 좁다 (to be narrow)
• 자동차가 = a car / cars
  • subject marker 가
• 못 들어가요 = cannot go in / cannot enter

So the structure is roughly:

• As for this alley, because it’s narrow, cars can’t enter.

Korean often puts the reason first and the result after it.

은/는 marks the topic of the sentence.

So 이 골목은 means something like:

• as for this alley
• this alley, ...

The speaker is introducing the alley as the thing being talked about, and then says something about it.

If you changed it to 이 골목이, the feeling would be a bit different. 이 골목이 would focus more directly on this alley itself as the subject, while 이 골목은 sounds more like setting the topic and then giving information about it.

In everyday speech, 은/는 is very common when describing something generally like this.

좁다 is the dictionary form, meaning to be narrow.

To connect it to the next clause with a meaning like because it is narrow or so it is narrow, Korean uses -아서 / -어서.

So:

• 좁다 → remove 다
• add -아서
• result: 좁아서

This happens because 좁다 has the vowel ㅏ in the stem, so it takes -아서 rather than -어서.

A few examples:

• 작다 → 작아서 = because it is small
• 예쁘다 → 예뻐서 = because it is pretty
• 멀다 → 멀어서 = because it is far

Here, -아서 / -어서 connects two ideas and gives a reason/cause:

• 좁아서 = because it’s narrow
• or more naturally in English, it’s narrow, so...

So the full sentence means:

• This alley is narrow, so cars can’t go in.

This ending can also simply connect actions in sequence in other contexts, but in this sentence it clearly expresses cause.

Because 자동차 is not the object here. It is the thing that cannot enter.

In Korean, 들어가다 means to go in / to enter, and it usually does not take a direct object with 를/을 in this kind of sentence.

So:

• 자동차가 못 들어가요 = cars can’t go in

Here, 자동차가 is the subject of 못 들어가요.

If you used 자동차를, it would sound like someone enters the car or would require a different verb structure.

Using 가 helps mark 자동차 as the subject of the second clause:

• 자동차가 못 들어가요 = cars can’t enter

This is very natural because the sentence first sets the topic:

• 이 골목은 = as for this alley

Then it gives the result involving the subject:

• 자동차가 못 들어가요 = cars can’t enter

So the sentence has this shape:

• Topic: this alley
• Reason/result statement: cars can’t enter

If you said 자동차는, it would shift the nuance to something more contrastive, like:

• As for cars, they can’t enter
  (maybe implying something else can)

That is possible in some contexts, but 자동차가 is the most neutral and natural here.

This is a very important difference.

• 못 들어가요 = cannot go in
  • inability / impossibility
• 안 들어가요 = do not go in
  • simple negation, often choice or fact

So in this sentence:

• 자동차가 못 들어가요 = cars can’t enter = the alley is too narrow, so it is impossible or not feasible

If you said:

• 자동차가 안 들어가요

it could sound more like:

• cars don’t go in
• cars aren’t entering

That does not clearly express inability.

So 못 is the right choice because the narrowness prevents entry.

In Korean, 못 usually comes before the verb to mean cannot:

• 못 가요 = cannot go
• 못 먹어요 = cannot eat
• 못 들어가요 = cannot enter

So:

• 자동차가 못 들어가요 = cars cannot go in

This is the normal pattern.

Be careful not to confuse this with 못하다, which can be either:

1. 못 + 하다 = cannot do
2. 못하다 as one word = to be bad at

For this sentence, 못 들어가요 is just the regular 못 + verb pattern.

들어가요 comes from 들어가다, which means:

• to go in
• to enter

It is made from:

• 들어- = in / into
• 가다 = to go

So it has the sense of go into.

That is why 자동차가 못 들어가요 literally feels like:

• cars cannot go into it

This is very natural Korean for entering a space like an alley, room, building, or road.

It can be either a car or cars, depending on context.

Korean nouns usually do not have to show singular/plural the way English does.

So 자동차가 못 들어가요 could mean:

• a car can’t enter
• cars can’t enter

In English, the most natural translation here is usually cars can’t enter or a car can’t go in, depending on the situation.

If Korean really wants to emphasize plural, it can use 들:

• 자동차들이 못 들어가요

But in most everyday sentences, that is unnecessary.

-아요 / -어요 / -여요 with 요 is the standard polite conversational style.

So 못 들어가요 is polite and very common in daily speech.

Here are some versions:

• 이 골목은 좁아서 자동차가 못 들어가요.

  • polite everyday speech

• 이 골목은 좁아서 자동차가 못 들어갑니다.

  • more formal

• 이 골목은 좁아서 자동차가 못 들어가.

  • casual / plain speech

All mean basically the same thing, but the politeness level changes.

Yes, you could say:

• 이 골목은 좁으니까 자동차가 못 들어가요.

This also means:

• Because this alley is narrow, cars can’t enter.

But there is a nuance difference:

• -아서 / -어서 often sounds like a natural cause-and-result connection
• -(으)니까 can sound a bit more direct, explanatory, or like giving a reason more explicitly

In this sentence, 좁아서 sounds very natural and smooth.

So:

• 좁아서 = neutral, natural cause
• 좁으니까 = also correct, slightly more explicit as a reason

A careful pronunciation guide would be roughly:

• 이 골모근 조바서 자동차가 몯 드러가요

A few helpful notes:

• 골목은 often sounds closer to 골모근 in natural speech because of sound changes
• 좁아서 is pronounced more like 조바서
• 못 들어가요 can sound like 몯 드러가요

You do not need to pronounce every written consonant exactly as it looks. Korean pronunciation changes a lot in connected speech.

The most important thing is to get comfortable hearing the whole sentence as a smooth unit:

• 이 골목은 좁아서 자동차가 못 들어가요