ABSTRACT Moh. Riadi, 2020," Error Analysis of Prepositional Phrase Using Three Diagram in Syntax at Bright English of Talented Program ( BETTER ) at IAIN Madura”, English Teaching Learning Program (TBI), Tarbiyah Faculty, State Islamic Institute of Madura, advisor: Mulyadi, S.S., M.Pd Keyword: Error Analysis, Prepositional Phrase, Tree Diagram, BETTER. BETTER is the abbreviation of Brig…