摘要：From psycholinguistic aspect, language learning not only requires acquisition and progression, but it also exists in attrition and regression. Within Chinese as a native language, the learning and living environment would directly affect the language input and contact for English as a foreign language (EFL) learner. English tense is totally different from that of Chinese in terms of concept. Based on Inverse Hypothesis, the present thesis aims to take English tense as a breakthrough point in this diachronic research, as well as to reveal and analyze the variability of mastering tenses for EFL learners. Meanwhile, it also strives to validate the feasibility of slowing down the speed of language attrition by increasing the English input and contact. In Chinese context, how to resist attrition effectively and retain their acquired language abilities will yield a lot of benefits to language teaching and learning both for teachers and EFL learners.
