1)you/try/to phone me? (half an hour)
How long have you benn trying to phone me?
I've been trying to phone you for half an hour.
2)the chicken/cook/in the oven? (about twenty minutes)
How long has the chicken been cooking in the oven?
It has been cooking in the oven for about twenty minutes.
3)Ronaldo/play football/for Real Madrid? (start of the season)
How long has Ronaldo been playing football for Real Madrid?
He has been playing for Real Madrid since the start of the season.
4)he/clean his motorbike? (two hours)
How long has he been cleaning his motorbike?
He has been cleaning it for two hours.
5)you/wait to see the doctor? (nine o'clock)
How long have you been waiting to see the doctor?
I've been waiting to see him since nine o'clock.
6)your sister/live in Florida? (over a year)
How long has your sister been living in Florida?
She has been living in Florida for over a year.