ABSTRACT PUJI RAHAYU, 2015. “ A Study on How the Native English Speaker Teach Diphthong to The Students of SMKN 1 Pakong ” Thesis English Teaching Learning Program of Tarbiyah Departement. The State of Islamic College (STAIN), Advisor: Eva Nikmatul Rabbianty, M. Pd. Key words: Native English Speaker, Pronounciation, Diphthong and Games English is a foreign language. Its taught to the st…