The boy is sorry he is not a doctor
The boy wishes...... he was a doctor
He hasn't seen her for twelve years
He last..... saw her twelve years ago
When did you start to listen to pop music?
How long..... have you listened to pop music?
We haven't gone to the concert for over a year
The last time..... we went to the concert was over a year ago
We last saw our grandfather two years ago
We haven't.... saw our grandfather for two years
We haven't eaten seafood before
This is the first time....... we have eaten sea food
They have learnt English for ten years now
They started....learning english ten years ago
She started give up smoking last year
She hasn't.......given up smoking
Tom has worked in that factory since 1990
Tom began....to work in that factory in 1990