Answer:
Remember:
Can = I Can
Can't = Can + Not
Could = I Could
Couldn't = Could + Not
Step-by-step explanation:
The parts that use an ' in the words just mean two words where combined together and the "o" was taken away!
Does that help?
6. couldn't
7. could
8. can't
9. couldn't
10. could
11. couldn't
12. can't
13. couldn't
14. can
15. can't
16. could
17. could
18. couldn't
19. can't
20. can't
I am pretty sure this is correct!
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