非限定动词( nonfinite、verbal)不受主语的人称、数和时态的限制，与限定动词相对。非限定动词不能做谓语，是一种名词化的动词，故又称之为非谓语动词。

英语中共有三种非限定动词，分别是：动词不定式（Infinitive）、动名词（Gerund）、分词（Participle）（包括现在分词和过去分词)。

A nonfinite verb is any of several verb forms that are not finite verbs; that is, they cannot serve as the root of an independent clause. Nonfinite verbs found in English typically are infinitives, participles and gerunds. (They sometimes are called verbals—although that term has traditionally applied only to participles and gerunds.) Additional nonfinite forms found in some other languages include converbs, gerundives and supines.