"솔로" menas "solo". but nowdays, "솔로" mostly means what haven't girlfriend or boyfriend status. it was started in internet. Actually, korean uses many many internet idiom. it's very difficult.

I know XXXXXX -> "난 XXXXX 알어" (존칭)"저는 XXXXX 알아요"

yes. It has problem. "먹어도 또 보여요" is correctly senetence. but possible understaind it and an article. not problem in grammar. I thought this senetece during about 10 seconds. and I understand it. It means to english "Eat again, eat again, eat again, It looks again" "약을 왜 버렸노?" it's 경상도 folks. "약을 왜 버렸냐?" standard. "먹어도 다시 보여요" it's not 경상도 folks. it's only strange situation. so we dont understand it. you were explain to grammar. probably, that's not right..... I don't understand exactly. because doesn't learn to korean grammar. finally, sorry to you that my lacked english skills. thank you.

"삘탈때", "줄겸" don't existed in korea dictionary and general dialog. don't understand this sentence

today at work I was so tired that when I went to the bathroom I fell asleep on the toilet "오늘 (나는) 직장에서 너무 피곤해서 (나는) 샤워실에 갔고 화장실에서 잠들었다" 회화체 - "오늘 직장에서 너무 피곤해서 (bathroom 생략) 화장실에서 잠들었어!" One time at work I was so tired that when i went to the bathroom I feel asleep on the toilet One time "어느 때" in dictionary but "어느 때" is naturally "저번에" or "언제 한번" in this sentence. "저번에 직장에서 너무 피곤해서 (나는) (omission bathroom) 화장실에서 잠들었다"