有一些因素會影響語言學習如學習者的母語、年紀、身處外語環境的多少、語言能力、對本國語的堅持、學習動機與在乎學好發音等。在這份研究中將探討這些因素對外語學習的影響。教師在教授外語之前若能先了解這些原因，將有助於他們的教學。除了了解這些因素之外，對於教學的一些情形如大班級教學、教室秩序及同一班級不同語言程度的英語教學都是值得探討的議題。

There are some factors which influence English learning such as mother tongue, age, exposure, innate phonetic ability, identity and language ego, and motivation and concern for good pronunciation. In this study, these factors will be discussed with a view to helping teachers in their teaching. In addition to these factors, some circumstances in teaching such as teaching in a big class, discipline of a class and teaching different levels of proficiency in a class are also important issues for EFL teachers.