yeopseo-e jusoreul sseugo upyoreul butin da-eume baro uchetonge neoheosseo.

I wrote the address on the postcard, stuck on a stamp, and put it in the mailbox right away.

Breakdown of yeopseo-e jusoreul sseugo upyoreul butin da-eume baro uchetonge neoheosseo.

• ~를: object particle
• ~에: location particle
• 쓰다: to write
• 넣다: to put

Questions & Answers about yeopseo-e jusoreul sseugo upyoreul butin da-eume baro uchetonge neoheosseo.

Why is 에 used in 엽서에 주소를 쓰고?

Here, 에 marks the place/surface where something is written. So 엽서에 주소를 쓰다 means to write an address on a postcard.

This is different from 엽서를 쓰다, which usually means to write a postcard in the sense of composing the message/content.

So:

• 엽서에 주소를 쓰다 = write the address on the postcard
• 엽서를 쓰다 = write a postcard

Why are there two 를 particles: 주소를 and 우표를?

Because each one is the object of a different verb:

• 주소를 쓰고 = write the address
• 우표를 붙인 = attach the stamp

Korean often leaves out information that is obvious from context. In 우표를 붙이다, the thing you attach the stamp to is not repeated, because it is clearly the postcard.

So the full idea is something like:

• write the address
• attach the stamp to the postcard

What does 쓰고 mean here? Is -고 just and?

-고 connects verbs. In this sentence, it links actions in sequence:

• 주소를 쓰고 = write the address, and then...
• 우표를 붙인 다음에 = after attaching the stamp...

Often -고 can be translated as and, but in action sequences it often feels like and then.

It does not strongly emphasize completion by itself; it just links actions naturally.