ABSTRACT This Research Work focused on the Study into the Effects of Grammatical Errors in Secondary School Students’ English Essays. The research was conducted on essays written by thirty (30) Students of the Secondary Schools in Abuja Municipal Area Council (AMAC). The analysis of the essays revealed the deficiencies of some of the Students in using English tense. In the use of the present tense, for instance, Students had more difficulties in the use of present tense compare to the use ...