关键期假说长期以来是一个具有争议的话题,国内外学者仍然没有得出一致观点。关键期假说支持派认为二语学习越早越能够接近母语者的水平。而反对派认为年龄不是二语习得成效的决定性因素。本文通过对比儿童学习者和成人学习者二语习得的差异,提出了关键期假说对英语教学的一些启示。 The key period hypothesis has long been a topic of controversy, and scholars both at home and abroad have still not come to a consensus. The key period hypothesis advocates believe that the sooner the second language learning can be closer to the level of native speakers. The opposition did not think age was the decisive factor in second-language acquisition. By contrasting the difference of second language acquisition between children learners and adult learners, this paper puts forward some enlightenment of critical period hypothesis to English teaching.