I saw "ar" used as a question particle, and tried to put the question in the preterite ("did you like to go to france?"), which Duolingo didn't like.
I can't find an explanation on Duolingo or GnG about copular questions like this. How would the preterite form of this question be formed? Implicitly, how would I tell that this is a question in the conditional, and not about the past?
The construction of copular questions on Gramadach na Gaeilge is found here, and its overview of copular forms is here. Note that in Connemara, the original conditional form An mba … ? is still used (Ar … ? was originally only a preterite form, but is now also used for the conditional).