UNIT 2 Revision of The passive Infinitive不定式语法 不定式的时态和语态 不定式有时态和语态的变化,时态共四种,即一般式、完成式、进行式和完成进行式。语态分为主动语态和被动语态,如下表所示。语态 时态主动语态 被动语态一般式 to do to be done完成式 to have done to have been done进行式 to be doing /完成进行式 to have been doing/ 当动词不定式的逻辑主语是动词不定式所表示的动作的执行者时用主动语态;当动词不定式的逻辑主语是动词不定式所表达的动作的承受者时用被动语态。进行式和完成进行式没有被动语态。1.I have a lot of work to do.2._Can I help you? _Yes ,I have some clothes to be washed. 一)不定式的被动形式有下列用法1作主语:Itisanhonourformetobeaskedtospeakhere.2作宾语:SheaskedtobesenttoworkinXinjiang.一当不定式的