Question

this pen is smoother than all others. (change the degree of adjective)

Answer 1

this pen is smoothest of all other pens (superlative)
this pen is smooth.(simple)

hope it helps

Answer 2

heya!!

question -

this pen is smoother than all others. (change the degree of adjective)

answer -

this pen is smoother than all others. ( comparative )

this pen is the smoothest of all others. ( superlative )

#hope it helps..!!