He's been teaching for 20 years.
- He has been teaching for 20 years.
He's never told a lie.
- He has never told a lie.
He's studying history at university.
- He is studying history at the university.
He's used to speaking in public.
- He is used to speaking in public.
... last four years has been very, very hard for America's young people. I want you to be ...
... SOMETIMES IN LIFE A MAN HAS TO DECIDE WHAT'S REALLY IMPORTANT. ...