因特网技术的出现已经而且将来会更加对第二语言习得产生最为深远的影响。这是因为因特网为可理解的语言输入和在真实语境中与说本族语的人进行有意义的交流提供了无限的可能性。此外 ,它还提供了一个更符合结构主义教学理念的、更以学生为中心的学习环境。本文首先从总体上介绍作为一种学习理论的建构主义 ,然后把建构主义理论和第二语言习得总体上加以联系 ,之后又具体地联系到因特网为语言学习提供的各种可能的机会上。本文还论述了因特网在课堂语言教学中的应用、其优势以及因特网用于第二语言学习中的关切问题 The advent of Internet technology has, and will continue to have, the most profound impact on second language acquisition. This is because the Internet offers a great deal of possibilities for a meaningful exchange of understandable language input and speaking native speakers in real context. In addition, it provides a more student-centered learning environment that is more in line with the structuralist teaching philosophy. This article begins with a general introduction of constructivism as a learning theory, and then connects constructivist theory with second language acquisition as a whole, and then specifically with the Internet to all possible opportunities for language learning. This article also discusses the use of the Internet in classroom language teaching, its advantages, and the Internet’s concerns for second language learning