peneuro pyeonjireul sseoyo.

object particle

Breakdown of peneuro pyeonjireul sseoyo.

• ~으로: instrumental particle
• 편지: letter
• 쓰다: to write

Questions & Answers about peneuro pyeonjireul sseoyo.

What is the function of -으로 in 펜으로?

-으로 is the instrument/means particle. It marks 펜 as the tool you’re using—so 펜으로 literally means “by/with a pen.”

When do you attach -으로 vs. -로?

• If a noun ends in a consonant (except ㄹ), you use -으로.
• If a noun ends in a vowel or in ㄹ, you use -로.
  Since 펜 ends in ㄴ, we use 펜으로.

Why is 편지를 marked with -를?

-를 (or -을) is the direct-object particle. It tells you that 편지 is what is being written—the target of the action.

Can you omit the object particle -를, and just say 편지?

In casual speech you might hear it dropped—펜으로 편지 써요—but including -를 is more natural and grammatical, especially in writing or formal contexts.

Why is the verb 써요 instead of 쓰다?

쓰다 is the dictionary (infinitive) form meaning “to write.” is the present-tense polite form, “(I/you/they) write.”