eu > en
1 adb. [aldi batez] once, one time
behin eta ez bi aldiz: once, not twice
astean behin garbitzen du autoa: she cleans her car once a week
2 adb. [une batean] once
behin zure amarekin topo egin nuen: I once met your mother
behin Parisera joan ginen eta...: once we went to Paris and...