"The youth lives in hotels."

Translation: Ungdommen bor på hoteller.

[SandmanRI]

is there any way to know when to use "i" and when "pa"?

[e_kat_e]

In this case, if we used "i" it would mean we live in a hottel in general. "Bor på" is like staying somewhere for a while.

[Mr.X952790]

So i spend my holidays på en campingplads?

[JohnJohnNL]

For the most part, it is getting the hang of it by hearing and speaking a lot of Danish. Not easy

[knightline]

Youth can be singular or plural. e.g. "The youth of today are better educated". "The youth is reading his book". Ungdom should be accepted.