Learn Hardcore Korean: sijangeseo chingureul mannayo.

The particle -에서 marks the location where an action takes place. Here, the meeting happens at the market. If you used 시장에, that would only mark the destination (“to the market”) or a location of existence (like “is at the market”) but not specifically the site of an action.

What does the particle -를 do in 친구를?

-를 is the direct‐object marker. It tells you that 친구 is the object of the verb 만나요 (i.e., the thing being met).

What is the tense and politeness level of 만나요, and how is it formed?

만나요 is present tense, polite-informal speech (해요체). It’s built from the verb stem 만나- plus the ending -아요. Because the stem ends in the vowel ㅏ, you attach -아요, which contracts naturally into 만나요.

Why is there no subject in this sentence? Who is doing the meeting?

In Korean, subjects are often omitted when they’re clear from context. Here, the implied subject is usually I (저) or we (우리), depending on who’s speaking.

Why does the verb come at the end of the sentence? Can I change the word order?