Hi everyone! How do we explain the omission of a definite article 'the' before the noun used after the preposition 'back to'? E.g. I was returning back to camp. I feel like going back to bed. back to basics The last two are set expressions, I think. But what about the first one? I think 'back to the camp' would not be a mistake. But why is it used without the article here? I mean, it sounds right, but why? Thanks in advance!