In this paper, the ambiguity of syntactic function in English prepositional phrases is discussed, ways to test different syntactic functions of prepositional phrases are suggested, so as to help English learners to eliminate the ambiguity in their study.

• 讨论了常见的英语介词短语的句法功能及句法歧义,提出了检测介词短语之不同句法功能的方法,旨在帮助学生在英语学习中排除歧义,提高理解英文的能力。