1) I was having lunch while my mum was washing the dishes
2) Have you finished your homework yet?
3) They have never travel abroad.
4) Jeff was watching a documentary on tv at 7 oclock yesterday evening
5) Diane bought a new computer 2 months ago
6) I was tidying my room when the lights suddenly went off.
7) Gary has already cooked dinner.
8) Did she walk to school yesterday?
9) Mike has just come home from work