Now I have that wonderful song by Bløf 'Wat zou je doen' in my head. :)
Wat is de reden dat er nu were gebruikt moet worden en niet was?
Because that's how it is in english, you always say "you were". If you said "you was" it would simply be wrong. And in dutch the correct conjugation is "je was"
It's called the subjunctive mood in English; it creeps up every now and then
Ik luister naar Mannenharten