This study investigates the effect of teacher's written corrective feedback (WCF) on acquisition of explicit and implicit knowledge of simple past tense by language learners. Eighty-seven Iranian beginner learners of English participated in this study. The participants were randomly assigned to three groups: focused direct WCF, focused indirect…

Almost no language test is void of grammar items, and the reason is probably the assumption that there exists a positive correlation between examinees' grammar knowledge and the actual demonstrable level of accuracy in communication. Meanwhile, examples abound where many examinees relatively do well on grammar knowledge tests despite failing to…