How long _______ you _________ (wait) for the bus?
How long have you been waiting for the bus?
I ___________(already/see) this film twice. Let´s watch something else.
I´ve already seen this film twice. Let´s watch something else.
I __________(get) stuck in traffic because there __________ (be) an accident earlier that morning.
I got stuck in traffic because there had been an accident earlier that morning.
What´s the mistake? We didn´t used to eat vegetables but now we love them.
We didn´t use to eat vegetables but now we love them.