напишите пожалуйста изомеры бутена-2 и пентена-2

Впишите -s (-es) там, где это нужно.

1. this girl ... run...

2. I run...

3. Ann cook...

4. Ann can cook...

5. Tom swim...

6. the man... come...

7. jim go ... home

8. I go... home

9. Mum can scate...

10. dog... like... it

11. cat.. eat... fish...

12. he can run...

13. this girl ... can run...

14. he see... that bird...

15. Ann and Jill cook...

16. this boy... ski...

17. Tom can swim...

18. those boy ... ski...

19. these boy... ski...

20. the men... come...

21. Tom and Ted swim...

22. Mum like... banana...

23. kitten... drink... milk...

24. mice... like... cheese