Translation:Hope you can all come to my party.
"can" in this situation would probably be a better translation than "could"
Wouldn't in English "you can all come" be better than "you all can come"? "You all" or "y'all" sounds very colloquial/informal.
Not sure about better, I would interpret the meaning slightly differently.
"you all can" sounds more natural to me. Furthermore, "all" is not supposed to be mandatory. I tried to use "you guys" and it was deemed wrong by the app
You'd be right if it were "ta men", but the added "dou" makes it more like "all of you", which does need to be specified
你们 (ni men) is plural you, so "you", "you guys", "y'all", "you all", are all fine even if they haven't been added to the system for this one yet. And like you say the added "dou" makes it inclusive so maybe "all y'all" (all of you all) which is said in some regions.
I’d really like an answer to this one too!
I’d love to know if 希望 can be used to mean “hopefully” as well as “I hope”. And if not, why not?
Hopefully you can all come to my party.
It’s fine. Please do report it as a correct solution!
“I hope that all of you can come to my party.”
Maybe, but everyone is different than plural "you". So I think "all of you" or "you guys" is better.
"I hope you all come to my party." is perfectly fine, too, and should be accepted.
The subjunctive is in its waning phase in modern English, but it isn't dead yet! ;)
Despite duo's definition (will, could, can) 能 conveys more the meaning of "ability". http://dictionary.reverso.net/chinese-english/%E8%83%BD So I think Duo is correct in being "picky" here, that way that we learn this distinction and don't say one thing when we really mean to something else :)
你们 have to translate to "you guy" as it is used by Duo yourself, why you correct me with "you"?
It would have to be "you guys", not "you guy". However that is still very colloquial, so you need to be very selective in the context in which you used it as it would be out of place in many situations.
The dictionary hints for 希望 say "Hope" or "Wish" But, every time I say, "I wish you all could come to my party" I am told it is wrong....