留学生在习得被动句时有这样的偏误倾向:就是忽视语言习惯和表达需要,通过机械地移位来实现主动句和被动句之间的转换,或者回避使用被动句,以至于达不到实际的交际效果。从句法角度研究主动句和被动句转换条件的成果很多,本文将尝试从功能语言学的角度,探析主动句和被动句之间转换的规则,以期减少被动句习得的偏误。 Students in the acquisition of passive sentences tend to have such a tendency to bias: that is, ignore the language habits and expression needs, by mechanically shifting the active and passive sentences to achieve the conversion, or to avoid the use of passive sentences, so that can not reach The actual communicative effect. From the perspective of syntactic study, there are many achievements in the conversion of active sentences and passive sentences. This paper attempts to explore the rules of conversion between active and passive sentences from the perspective of functional linguistics, in order to reduce the errors of passive sentences.