Learn Hardcore Korean: beoseuna jihacheoreul tayo.

In this sentence, 나 means “or.” It lists alternatives (bus or subway). It feels more conversational than 또는, which is more formal or written. By using 나, you imply that either option is fine.

Why is 지하철 followed by 을, and why isn't 버스 marked as well?

을 (or 를) is the object marker indicating what you ride. When you join nouns with 나, only the final noun takes the case marker. So 버스나 지하철을 literally marks “bus or subway” as one combined object of 타요.

Why is there no subject like “I” or “we” in 버스나 지하철을 타요?

In Korean, if the subject is clear from context, it’s often dropped. Here, it’s understood that you’re talking about yourself (저는) or your group (우리는), so you don’t need to say it explicitly.

What tense and level of politeness is expressed by 타요?

타요 is the present-tense polite form of 타다 (to ride). You form it by taking the verb stem 타-, adding -아요, and contracting 타아요 to 타요. This makes it polite but still conversational.

Can I use 또는 instead of 나? What’s the difference?

Yes, you can say 버스 또는 지하철을 타요, but 또는 is more formal and often appears in written announcements or signage. 나 is more natural in everyday spoken Korean.

What’s the word order in 버스나 지하철을 타요, and how does it compare to English?

Korean follows Subject–Object–Verb order:
• (Subject) + Object(버스나 지하철을) + Verb(타요).
English uses Subject–Verb–Object: “I ride the bus or subway.” In Korean, the verb always comes at the end.

Why do we say 타요 and not 타아요?

When a verb stem ends in ㅏ or ㅗ, attaching -아요 often contracts. So 타 + 아요 becomes 타아요, which simplifies to 타요 in normal speech.