Some nouns have the same singular and plural; here's a short explanation I located: there are some nouns that are invariable: this means they only have one form for the singular and the plural. Unfortunately, they only have to be learned! One example can be the nouns ending with a stressed vowel, whether feminine or masculine. Examples: la città → le città (the city – the cities) la virtù → le virtù (the virtue – the virtues) il papà → i papà (the dad – the dads)----------------hope this helps, e' una difficolta', non e' vero?
Which are the difficulties? DL says it's wrong.
DL usually makes you translate "queali" as "which", which I find too formal and very unnatural sounding in many cases. This time I did use DL's favorite "which" and now DL wants "what".
"Which" is grammatically correct since it works in the context of being presented with choices i.e. le difficoltà is plural.
If you're referring to DL's sentence, there's a difference between 'a difficulty' singular and 'difficulties' plural. If you're referring to the previous comments I'd say there's no problem at all, just users like yourself trying to improve their understanding of how Italian works. Disagreement's not a problem unless those who disagree are unwilling to listen to opposing views.
The former - which was intended as word play. My question really was meant to ask 'Are 'problems' equivalent to 'difficulties' as far as the translation is concerned. I.e. such that the translation could just as well have been "What are the problems?" OR if we were to say it in the singular would the vernacular "What's the problem?" be equally as correct as "What's the difficulty?" - which whilst proper is a somewhat formal and slightly less common way of asking the same thing in English.
Ok, I just wasn't sure. In my mind, 'problems' and 'difficulties' are generally synonymous. We speak e.g., of a "problem child" or "difficult child." "Problems with the law" and "difficulties with the law". Thinking about it, 'difficulties' strikes me as somewhat less serious than "problems". But by and large, I think they're interchangeable.