1.속도 줄여.
Slow down./ Better say : Reduce the speed.
2.저는 환절기에 기침을 많이 해요.
I cough a lot during the change of seasons./Better say : I cough a lot during the changing season.
3.나를 꽉 안아 줄래요?
Can you hug me tight? /Better say : Will you hold me tight?