krevet
Hvala
Dobrodošli
Kako ste?
Mali miš
Dobro veče.
Sretan bosic.
It depends you could say you have to be on the bed, or you have to be in bed. If you are referring to having to be asleep at or having a bedtime, the correct form is "have to be in bed"
bed
This is how you say get on bed in Russian: Lajis na pastel=get on bed. I hope I helped you :)
Sre'can rodjendan, Sretan Rodjendan
"Go to bed"
bed in french would be être.