1. write questions for these answers with how long and the present perfect they've been in class for 15 minutes he's known john since he was at primary school mary has worked in miami since 2007 pat and ray have been married for one year my mother has had a motorbike since last year they've studied chinese for two years
How long has he known John?
How long has Mary worked in Miami?
How long Pat and Rat have been married?
How long has had your mothed a motorbike?
How long have they studied in China?
How long has my mother had a motorbike?
6 Have they studied Chinese for two years?
How long have they studied Chinese?