IntroductionThe attitudes towards foreign learners’ errors have changed remarkably from the 1960s to recentyears.In the eyes of behaviourists in the 1960s,errors were considered terrible.Teachers tried tostructure the classroom situation so as to make it ideally impossible for students to make errors.Sincethe evolution of Chomsky’s theory and modernism,teachers have begun to believe thatcommunication in the language is more important than a sterile perfection of form.and therefore,they have become more tolerant of students’ errors.Making errors has been recognised more andmore as inevitable and as an essential part of language learning.