1. Mum (cook) dinner since 9 a.m.
2. How long (you/study) English?
3. The children (play) computer games for 3 hours.
4. …………your granny (watch) TV since morning?
5. My father (work) in the garage for 2 hours.

has cooked/has been cookinghave you studied/have you been studyinghave played/ have been playingHas your granny watched/ has your granny been watchinghas worked/has been working