Pongpuen, T.; Kimura, L. N.; Kijpoonphol, W.; Anupan, J. AN EFFECT OF A DIRECT METHOD ON 5TH GRADE STUDENTS’ ACQUISITION OF VERB INFLECTION MORPHEMES (- S, - ES, - ED, - ING). Int. J. Res. Granthaalayah 2018, 6, 310-321.