biga oneunde taeksireul talkkayo?

Here, -는데 gives background for what comes next. It often sounds like:

• since / because
• and so
• given that
• or sometimes just well, ...

So 비가 오는데 택시를 탈까요? is like:

• It’s raining, so shall we take a taxi?
• Since it’s raining, shall we take a taxi?

Important: -는데 does not always mean a strong, direct because. It often sounds softer and more conversational, as if the speaker is presenting the situation and then making a suggestion.

비가 오다 is the normal way to say it rains / it is raining.

• 비 = rain
• 오다 = to come
  So literally, Korean says something like rain comes.

The particle 가 marks 비 as the subject of the verb 오다.

So:

• 비가 오다 = it rains / it is raining

If you said 비는 오는데, that would add contrast or emphasis, something like:

• As for the rain, it is coming...
• It is raining, but...

That is possible in some contexts, but it is not the neutral, ordinary form here. For a simple statement of the weather, 비가 오는데 is the natural choice.

탈까요 comes from the verb 타다, which means to ride / to take a vehicle.

Breakdown:

• 타- = verb stem of 타다
• -ㄹ까요? = sentence ending used to suggest something, ask what someone thinks, or wonder about something
• 탈까요? = shall we ride/take...? or do you think we should ride/take...?

Because 타다 ends in a vowel, you attach -ㄹ까요 directly:

• 타다 → 탈까요?

So 택시를 탈까요? means Shall we take a taxi?

It can mean different things depending on context.

With -ㄹ까요?, the speaker may be:

1. Making a suggestion together

   • 택시를 탈까요?
   • Shall we take a taxi?

2. Asking for the listener’s opinion

   • What do you think about taking a taxi?

3. In some contexts, it can even mean shall I...?

   • for example, 제가 문을 닫을까요?
   • Shall I close the door?

In your sentence, the most natural reading is Shall we take a taxi? because the action is something both speaker and listener could do together.

In Korean, the verb 타다 is used for riding / boarding / taking transportation.

So:

• 버스를 타다 = take the bus
• 지하철을 타다 = take the subway
• 택시를 타다 = take a taxi
• 자전거를 타다 = ride a bicycle

The particle 를 marks 택시 as the object of 타다.

English uses take for transportation, but Korean uses 타다, which is closer to ride.

Yes. 탈까요? is a polite form.

So 비가 오는데 택시를 탈까요? is a polite, natural sentence for everyday conversation.

You could use it with:

• someone you do not speak casually with
• a coworker
• a classmate you are being polite to
• a stranger in an appropriate context

With a close friend, you might say the casual version:

• 비가 오는데 택시 탈까?

That means the same thing, but in a casual style.

A close breakdown is:

• 비가 = rain + subject marker
• 오는데 = is coming / it’s raining + background connector
• 택시를 = taxi + object marker
• 탈까요? = shall we ride/take?

So literally, it is something like:

• Rain is coming, shall we take a taxi?

But natural English is:

• It’s raining, shall we take a taxi?

Yes, but the nuance changes.

1. 비가 와서 택시를 탈까요?

This sounds less natural for a suggestion sentence. -아서/어서 often connects actions or reasons, but with a suggestion like -ㄹ까요?, it is usually not the best choice here.

2. 비가 오니까 택시를 탈까요?

This is possible and means something like:

• Since it’s raining, shall we take a taxi?

Compared with -는데, -니까 sounds more clearly causal, more directly because/since.

3. 비가 오는데 택시를 탈까요?

This is softer and very natural in conversation. It presents the situation first, then the suggestion.

So if you want a very natural conversational tone, -는데 works very well here.

Yes. In Korean, many questions with endings like -ㄹ까요? function as suggestions rather than requests for information.

So the speaker is not simply asking, Is it possible that we will take a taxi?
They are really suggesting:

• How about taking a taxi?
• Shall we take a taxi?

This is very common in Korean. A question form often softens a suggestion and makes it more polite.

A natural pronunciation is roughly:

• 비가 오는데 택시를 탈까요?
• bi-ga o-neun-de taek-si-reul tal-kka-yo?

A few pronunciation notes:

• 오는데 is pronounced smoothly as 오는데
• 를 in normal speech often sounds lighter, almost like 륿/를, and many learners hear 택시를 almost like 택시를 / 택실 depending on speed
• 탈까요 has a tense kk sound: tal-kkayo

You do not need to force every syllable separately; in natural speech it flows together.

Yes. The choice affects the time nuance.

• 비가 오는데 = it’s raining / rain is coming
• 비가 왔는데 = it rained / it has come to rain / it was raining, and...

In your sentence, 오는데 is used because the rain is the current situation that motivates the suggestion to take a taxi.

So the speaker is basically saying:

• It’s raining right now, so shall we take a taxi?

That makes 오는데 the natural choice.