English is the most widely used language and the chief vehicle of international communication in the world today. In India, English is learnt as a second language.Learning English language is sometimes difficult since the it has different elements compared to the native language (Gujarati). These differences sometimes cause students to make errors when using it. This study aimed to investigate the students' interlanguage errors in grammar. Sardar Patel University, Vallabh Vidyanagar, Gujarat, India awarded M.phil Degree to this research work in April 2015.