Umseting - Turkiskt-Enskt - sonra dedenin verdiği boş kabı alıp dönerlermiş

they used to return....> they have returned.

they have returned --> döndüler.

dönerlermiş ..> they used to return

Merdogan, while we are talking about an action which regularly happened in the past or just about an old habit, we use "used to".

Here "dönerlermiş" indicates a repeated past state, so we have to use "used to".