ABSTRACT Fudaili AlGafiqi, 2015, The Study of Grammatical Error of Auxiliaries Usage On Writing II Class For The Fourth Semester Studentsat The English Department of STAIN Pamekasan, Undergraduate, thesis, english teaching laearning program (TBI), the state of islamic college (STAIN) Pamekasan. Advisor : Mulyadi S.S. M.Pd Key Words : Grammatical Error, Auxiliaries Usage, Writing Writing is …