被动语态是英语语法学习中的重要部分。语态的形式与意义之间的关系是多样的。本文主要探讨被动语态中的岐义及主动形式转换成被动形式的一些特殊性，如：有几类动词的被动结构与主动结构表示相似的语意；有的短语动词转换成被动语态的可能性可以解释，而另一些却不能解释；不定式短语中的被动和主动结构的差异有时能与语意的差异对应，有时却不能，等等。 Passive voice is an important part of English grammar learning. The relationship between the form and meaning of voice is varied. This article mainly discusses the special meaning of disambiguation in passive voice and the conversion of active form into passive form, such as the semantic meaning of the passive structure and the active structure of some types of verbs; the possible conversion of some phrase verbs into passive voice Sex can be explained while others can not be explained; differences between passive and active structures in infinitive phrases can sometimes correspond to semantic differences, sometimes not, and so on.