"We are eating his bananas."
Translation:Wir essen seine Bananen.
Accusative plural of "sein(e)" is "seine" (for all genders). "Seinen" is accusative singular for masculine nouns (e.g. "der Apfel" - "Wir essen seinen Apfel.").
"Seine", "sein", and "seinen" are for "his". "Ihn" is for "him". Hope this helps :)
Can someone explain this to me a bit clearer why seine Bananen and seinen orangensaft? i need to understand all this stuff in a more basic context otherwise i'm going to go do first grade english again...
We are talking about someone having/eating something, so we are using the accusitive case. It is essential to unserstand the cases, there are four of them. I found it really hard, got stuck here for about a month. But, once you get it much of this makes sense. For now, to answer your question, when the piece of fruit is owned/eaten by the subject, the sentence is nominative, then a plural piece of fruit will always be seinE. The E is the sign of it referring to a plural, or a female thing. A male object will be seinen, and a neutral object will be sein.