Degrees of comparison of adverbs

Example: Jim can run (fast) than John. Jim can run faster than John.

1.I speak English (fluent) now than last year. 2.She greeted me (polite) of all.

3.She smiled (happy) than before. 4. Our team played (badly) of all.

5. Could you write (clear)?

6. Planes can fly (high) than birds.​