The boy __________ (be) on a rollercoaster before.

Sascha ___________ (go) home when I arrived at school.

Tina ________ (live) in Liverpool for two years before she moved to Berlin.

When I met the President of the USA, I was very nervous because I _______ (not meet) him before.

When Erica wanted to pay, she noticed that someone __________ (steal) her money.

When Sarah wanted to enter the concert hall, she noticed that she ________ (forget) the tickets.