1. Sam has been riding a bike for 15 minutes and has ridden 3 miles.
2. Mary has been doing the shopping since 10 o'clock and has bought a lot of food.
3. Bill has been reading detective stories for 4 days and has read 2 stories.
4. Sally has been making pancakes since early morning and has made 50 big pancakes.
5. Roy has been watching videos for 4 hours and has seen 2 films.
6. Jack has been training since childhood and has thrown the ball 100 meters.
7. Sarah has been washing up for 2 minutes and has broken a few plates.
8. The children have been planting flowers since Monday and have planted a lot of primroses.
