sigani eobseuni taeksireul tayo.

없으니 is the verb 없다 plus the connective ending -으니.

• 없다 = to not exist / to not have
• -으니 = since, because, so

So 시간이 없으니 means since there is no time or because we don’t have time.

In this sentence, it gives the reason for the next action: 택시를 타요.

Because 있다 / 없다 usually work with the subject marker 이/가, not the object marker 을/를.

Korean treats time as the thing that exists or does not exist.

• 시간이 있다 = there is time / to have time
• 시간이 없다 = there is no time / to not have time

So 시간이 없으니 is the normal form.

You could also say 시간은 없으니, but that changes the nuance. 은/는 makes 시간 a topic and can sound contrastive, like as for time, we don’t have any.

In Korean, 타다 is the normal verb for riding or taking a vehicle.

So you say:

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

English often uses take for transportation, but Korean usually uses 타다, which literally has the idea of ride/get on.

So 택시를 타요 is the natural Korean expression for take a taxi.

Yes, you can. Both are natural, but the nuance is a little different.

• 택시를 타요 = we take/ride a taxi
• 택시로 가요 = we go by taxi

The first focuses on the vehicle being used as something you ride.
The second focuses on the means of transportation using -로.

In many situations, both are fine. But with vehicles, 택시를 타다 is extremely common.

All of these can connect a reason to a result, but they do not feel exactly the same.

• 없으니 = since/because
• 없어서 = because, so
• 없으니까 = because, since

Some general differences:

• -아서/어서 is very common and neutral.
• -으니까 is very common in speech and often sounds direct and conversational.
• -으니 can sound a bit more formal, written, or matter-of-fact.

So:

• 시간이 없어서 택시를 타요
• 시간이 없으니까 택시를 타요
• 시간이 없으니 택시를 타요

All are possible, but -으니 may sound a little more formal or explanatory.

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

So 택시를 타요 does not explicitly say I, we, or you. The listener figures it out from the situation.

Depending on context, it could mean:

• I’ll take a taxi
• We’ll take a taxi
• Let’s take a taxi
• You should take a taxi

In many textbook examples like this, the understood subject is often we.

Yes. 타요 is the polite non-past form of 타다.

• dictionary form: 타다
• polite form: 타요

The Korean non-past can cover meanings that English expresses with present or future, depending on context.

So 택시를 타요 can mean things like:

• we take a taxi
• we are taking a taxi
• we will take a taxi

In context, after 시간이 없으니, it often feels like a decision or suggestion: Since we don’t have time, let’s take a taxi or we’ll take a taxi.

요 makes the sentence polite.

Compare:

• 택시를 타 = casual, plain speech
• 택시를 타요 = polite everyday speech

So 타요 is the kind of form you would use in normal polite conversation.

The sentence is not highly formal. If you wanted a more formal style, you might see 탑니다 instead.

Good question. Grammatically, 타다 combines with -아요, but in modern Korean it contracts:

• 타 + 아요 → 타요

This contraction is normal.

The same thing happens with many other verbs:

• 가다 → 가요
• 오다 → 와요
• 보다 → 봐요

So 타요 is just the natural contracted form.

In careful pronunciation, 없으니 is often heard approximately as 업쓰니.

That is because:

• 없 at the end of a syllable is pronounced like 업
• then the following 으 and ㅅ influence the sound across the syllables

So learners often hear something close to 업쓰니 rather than pronouncing every letter separately.

You do not need to overthink it at first, but it is useful to know that the spoken sound may differ from the spelling.