6. I’m not strong. I can’t lift this box.

7. Tom doesn’t have money. He can’t pay his bills.

8. This bed isn’t wide. Two people can’t sleep in the bed.

9. The water wasn’t clean. We couldn’t swim in it.

10. He wasn’t experienced. He can’t do that job.

11. I don’t have money. I can’t lend you some.

12. He is hungry. He can eat 3 sandwiches.

13. Peter isn’t tired. He can’t stay at home alone.

14. This seat isn’t wide. We can’t sit on it.

15. Susan isn’t old. She can’t stay at home alone.

16. That box is light. She can lift it.

17. I didn’t have time. I can eat breakfast this morning.

18. This shirt is big. He can wear it.

19. Mary doesn’t have money. She can’t buy a new bicycle.

20. It’t warm tonight. We can go out.