What would be the appropriate pronoun to use when addressing someone (say, one person who you’d normally address with du), but also including someone else who is not present at the moment?
A contrived example: There’s a party tonight. I'm talking to my friend Alice, and I want to ask her if she and our other mutual friend Bob are going to the party. Bob is not present in the conversation. How would I ask her this? Specifically, what pronoun do I use talk about her and Bob simultaneously, even though Bob isn’t there?
Choice 1 (2nd person singular, du form):
Gehst du und Bob zur Party?
Choice 2: (3rd person singular, er/sie/es form)
Geht du und Bob zur Party?
Choice 3: (2nd person plural, ihr form)
Geht du und Bob zur Party?
Choice 4: (3rd person plural, sie form)
Gehen du und Bob zur Party?
I feel like none of these fully make sense. Choices 1 and 2 seem wrong because the subject of the sentence is two people, even though you’re only talking to one of them. Choice 3 feels wrong because ihr implies I’m talking to more than one person, but only Alice is here. Choice 4 feels wrong because now I’m talking completely in the 3rd person while addressing one of the people in question.
There’s probably some non-standard way to handle this, but I’m not sure what would sound colloquially appropriate.