"I showed you yesterday" is an independent clause because it can be a standalone sentence and expresses a complete thought compared to a dependent clause which cannot stand by itself and only supports a sentence.<span />
Strong, powerful, helpful, heroic, super, responsible, hero, champion, model, exemplar, defender, guardian, protector, paladin, savior, warrior, protagonist, star, lead, victor, winner, good, positive, useful, voyager, capable, mighty, steady, hearty, valuable, effectual, friendly, essential, important, fortunate, applicable, advantageous, all-powerful, impressive, authoritative, capable, compelling, guardian, salvager, conservator, protector, protective, deliverer, redeemer, caring, considerate, improving, kind, neighborly, invaluable, bettering, benevolent, accommodating, and serendipitous. I HOPE I WAS HELPFUL HAVE A GOOD DAYYY