where is professor of linguistic? ur knowledge is needed to correct this: i've told them and i've tell them wich one is correct

Are you ready for this class my boy.U've got a pen?Write this;Whenever u use have,has and had your lexical verb would be in participle, eg go-went-gone,eat-ate-eaten

home work;tell-told-''tolden'' or ''tellen''

I believe you wont take that as answer!Let's see how it sounds;I've tolden them OR I've tellen them