I will go first - 먼저 갈게

먼저 갈게 is used colloquially to mean 'you will go home/leave first.'

It's used when you leave a place before your friend(s).

For example,

After school/work, if you leave first before others, you may say:

• 나 먼저 갈게. 내일 보자 = I will leave/go home first. See you tomorrow.

Likewise,

• 먼저 + Verb (Take off 다 and add ㄹ 게 for verbs without final consonants, and 을게 for verbs with final consonants)

E.g.

• 하다 → 할게 
• 먼저 할게 = I'll do first

• 먹다 → 먹을게
• 먼저 먹을게 = I'll eat first

• 먼저 할게 = I will do first
• 먼저 갈게 = I will go first
• 먼저 볼게 = I will watch/see first
• 먼저 먹을게 = I will eat first
• 먼저 마실게 = I will drink first
• 먼저 자러 갈게 = I will go to sleep first
• 먼저 살게 = I will buy first 

Example sentences

• 나 먼저 이 물 마실게 = I will drink this water first

• 졸려서 나 먼저 자러 갈게 = Because I'm sleepy, I'll go to sleep first

• 너 배 안고프면 나 먼저 먹을게 = If you're not hungry, I'll eat first

• 지금 이 책 안읽으면 나 먼저 볼게 = If you're not reading this book, I'll read it first

• 오늘은 일찍 들어가야 되서. 먼저 갈게. 내일 봐 = Today, Because I gotta get home early. I'll go (home) first. See you tomorrow