10. They haven't read this book for six weeks.
→The last time they read this book was six weeks ago.
11. They haven't played soccer with me five months age.
-> The last time they played soccer with me was five months ago.
12. Sam hasn't practiced the lessons ten days ago.
-> It's been ten days since Sam last practiced the lessons.
13. You have written the assignments for three hours.
-> You started writing the assignments three hours ago.
14. I have done the housework for two hours.
->. I began doing the housework two hours ago.
15. Linda must complete the exercises today.
-> The exercises must be completed by Linda today.

10. They haven't read this book for six weeks.
→The last time
I began
for
11. They haven't played soccer with me five months age.
→The last time
for
12. Sam hasn't practiced the lessons ten days ago.
It's
13. You have written the assignments for three hours.
→You started
14. I have done the housework for two hours.
I began
15. Linda must complete the exercises today.
The exercises