SpiceWare

True, my recent Duolingo lessons have been using formal you so sie was stuck in my mind.  Don't think I've seen anything yet about the trailing "ein" at the end, it seems odd to put "a" or "an" there. Probably in a later lesson.

I was doing fairly well in Duolingo, then they did a major overhaul of the lesson plan. It added a whole bunch of new stuff in the lessons I'd already finished, which was confusing me because the lessons I was at assumed I knew words I'd not yet seen, so I restarted the course from the beginning. I just started Unit 2 over the weekend.

Same thing happened with their Spanish course, which I also restarted. I've about a week left on Unit 1 for it.

In German: "Kaufst Du Ein?" comes from "Einkaufen" (shopping).

@SpiceWare Ja!