jeoneun hyudaeponeuro chinguege mesijireul bonaeyo.

I send a message to a friend on my phone.

Breakdown of jeoneun hyudaeponeuro chinguege mesijireul bonaeyo.

• 친구: friend
• ~를: object particle
• 저: I
• ~는: topic particle

Questions & Answers about jeoneun hyudaeponeuro chinguege mesijireul bonaeyo.

Why is it 저는 and not 나는 or 제가?

저는 is made of 저 + 는.

• 저 = I/me in a polite, humble style
• 는 = topic particle

So 저는 means something like as for me.

Why not the others?

• 나는: also means I, but 나 is less formal than 저
• 제가: 저
  • subject particle 가. This puts more focus on I as the subject

In a neutral polite sentence like this, 저는 sounds very natural.

What does the particle 는 do here?

는 marks the topic of the sentence.

In this sentence, 저는 sets up me as what the sentence is about:

• As for me, I send a message...

English usually does not mark topic separately, so this can feel new to learners.

Very roughly:

• 저는 = as for me
• 제가 = I (with more subject focus, often when identifying who did something)

Why is it 휴대폰으로?