1.Therootwordof"succeed"is"succeeds"(thirdpersonsingularpresenttense).2.Anotherrootwordformis"success"(noun).3.Thepasttenseof"succeed"is"succeeded".4.Anotherpasttenseformof"succeed"is"succeeded"(pastparticiple).5.Theadjectiveformof"succeed"is"successful".