What type of verb does not change in the nosotors form in spanish?

Question

and why? please explain.. thanks!

Answer 1

Did you mean impersonal verbs? Like "llover" (to rain), "granizar" (to hail), "nevar" (to snow), "doler"...which have only third person?

Answer 2

Every verb changes, its called conjugation. That way people know whether your talking about her, him, me, you, them, we, etc.