【摘要】 语言教学理论研究的重点正从以往的教师“怎么教”逐渐转移到语言学习者“怎么学”。关于语言习得问题，有许多假说和模型，其中最有影响和研究价值的有5种：习得一学习假说、自然顺序段说、监测器假说、输入仅说、情感过滤器假说。这些假说对于语言教学实践中，根据学习者的不同情况，采取灵活有效的教学方法，提高教学效果，具有一定的参考价值和指导意义。更多还原

【Abstract】 The focus of language teaching theories study is changing from the tradiitional "how to teach" for language learners to "how to learn". Many hypotheses and patterns have been put forward about language acquisition , among them, five hypotheses are most popular and popular and influntially : the acquisition - learning hypothesis , the natural order hy -potheris the moniter potheris the moniter moniter hypothesis , the input hypothesis and the affectire filter hypothesis . These hypotheses are very valuable to guide the practice of languages’ teaching, that is to adopt effective methods to teach learners of differentkinds so as to improve the teaching result.更多还原