1. Incorrect.
It should be “worst”, not “most bad”.
2. Incorrect.
It should be “as sporty as”, not “as sporty than”.
3. Correct.
4. Correct.
5. Incorrect.
It should be “a cheap one” or “a cheaper one”.
6. Incorrect.
It should be “better”, not “more good”.
7. Incorrect.
It should be “most”, not “more”.
8. Incorrect.
It should be “successful”, not “successfuls”.
9. Incorrect.
It should be “easier”, not “easyer”.
10. Correct.
I hope this helped!