［动词不定式］动词不定式
<p> 动词不定式由<span word="to">to</span>+动词原形构成。这里的<span word="to">to</span>是不定式标志，没有词义。不定式具有名词、形容词或副词的某些语法功能，又有动词的时态和语态的特点及作用。</p><p> 常见的形式如表所示（以及物动词<span word="do">do</span>为例），不及物动词没有被动语态。</p><p> 时态语态 主动 被动 一般式 <span word="to">to</span> <span word="do">do</span> <span word="to">to</span> <span word="be">be</span> <span word="done">done</span> 进行式 <span word="to">to</span> <span word="be">be</span> <span word="doing">doing</span> / 完成式 <span word="to">to</span> <span word="have">have</span> <span word="done">done</span> <span word="to">to</span> <span word="have">have</span> <span word="been">been</span> <span word="done">done</span> 完成进行式 <span word="to">to</span> <span word="have">have</span> <span word="been">been</span> <span word="doing">doing</span> /</p><p> </p>
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