Question

"More" expresses the same comparison as the_________ (-est,-er) suffix, and "most" expresses the same comparison as the_________ -(er,-est) suffix.

Answer 1

More:
-er

Most:
-est

Hope this helps!

Answer 2

"More" expresses the same comparison as the -er suffix.
For example: She sang bett-er than him.
"Most" expresses the same comparison as the -est suffix.
For example: He rode his skateboard the fast-est of them all. 

Hope this helps! (: