Zakiyah.Mutiatul.2018. An Analysis of Grammatical Errors On The Students’ Writing Personal Letter (A descriptive study on the Second Grade of SMA Muhammadiyah Tegal in Academic Year 2017/2018) Research Project. English Education. Teacher Training and Education Faculty. Pancasakti University Tegal. First Advisor Dr. Taufiqulloh, M.Hum and Second Advisor NL. Molla S.Pd., M.Hum. Keywords: Gra…