what are the verb forms of impartial, ponderous, and pretentious

Answer 1

I went to www.dictionary.com and looked up "impartial."
http://dictionary.reference.com/browse/impartial
It is an adjective and has a noun and an adverb form if you change the suffixes. No verb form.

You can try the same with the other two words. Let us know what you figure out, and we'll be happy to check your work.