Abstract: The mastery of grammar forms a basis for achieving proficiency in the four language skills. Teachers are, therefore, supposed to ensure that learners acquire adequate competence in grammar. In order to achieve this, the areas taught in grammar include: parts of speech, phrases, clauses and sentences. Proficiency in oral skills in the English language is tested in two ways, namely through written and oral methods. Based on a study conducted in secondary schools within Eldoret Municipality, this paper examines the relationship between scores attained in the two tests. The study was formulated and interpreted with reference to Communicative Language Teaching (CLT) approach.