eu > en
zein motatako ardoa gustatzen zaizu?: what type of wine do you like?
zein aukeratzen duzu?: which one are you going to choose?
2 gald. who
zein da?: who is it?
3 gald. how
zein polita: how pretty
4 junt. both... and...; as well as
amak zein alabak korrika egitea dute gustoko: both mother and daughter like running
pertsonak zein animaliak bizitzeko eskubidea dute: animals as well as people have the right to live