om, på or til
This may be a daft one but I'm having difficulty working out which word is most appropriate when translating from English to Danish. They seems to be fairly interchangeble as in, on, for etc.
I agree, it is not very logical.
You might want to skim through book. It has a quite comprehensive section on prepositions: https://nauchidatski.files.wordpress.com/2013/02/danish-an-essential-grammar.pdf