高中英语 语法精讲（Unit 14Freedom fighters）人教版
<p> 语法精讲 被动语态（<span word="voice">voice</span>）</p><p> 1.概念 当句子的主语是动作的执行者时，谓语的形式叫主动语态；当句子的主语是动作的承受者时，谓语的形式叫被动语态。</p><p> 2.构成 “助动词<span word="be">be</span>+过去分词”。助动词<span word="be">be</span>有时态、人称和数的变化，也可以构成否定或疑问式。</p><p> 3.用法 被动语态常用于下列场合：需要强调动作的承受者；只知道动作的承受者，不知道谁是动作的执行者；论述科技内容的文体需要强调客观性和科学性。如：</p><p> <span word="The">The</span> <span word="bridge">bridge</span> <span word="was">was</span> <span word="made">made</span> <span word="of">of</span> <span word="stone">stone</span>.</p><p> 这座桥是石头砌的。</p><p> <span word="A">A</span> <span word="lot">lot</span> <span word="of">of</span> <span word="people">people</span> <span word="were">were</span> <span word="killed">killed</span> <span word="in">in</span> <span word="the">the</span> <span word="fire">fire</span>.</p><p> 许多人葬身于火海中。</p><p> <span word="Pollution">Pollution</span> <span word="should">should</span> <span word="be">be</span> <span word="done">done</span> <span word="away">away</span> <span word="with">with</span>.污染一定要消除。</p><p> 4.各种时态的被动语态及其他形式的被动语态（见下表）</p><p> 时态名称 被动形式（以<span word="do">do</span>为例）</p><p> 一般现在时 <span word="am">am</span>/<span word="is">is</span>/<span word="are">are</span> <span word="done">done</span> 一般过去时 <span word="was">was</span>/<span word="were">were</span> <span word="done">done</span> 一般将来时 <span word="will">will</span>/<span word="shall">shall</span> <span word="be">be</span> <span word="done">done</span> 过去将来时 <span word="would">would</span> <span word="be">be</span> <span word="done">done</span> 现在进行时 <span word="am">am</span>/<span word="is">is</span>/<span word="are">are</span> <span word="bing">bing</span> <span word="done">done</span> 过去进行时 <span word="was">was</span>/<span word="were">were</span> <span word="being">being</span> <span word="done">done</span> 现在完成时 <span word="have">have</span>/<span word="has">has</span> <span word="been">been</span> <span word="done">done</span> 过去完成时 <span word="had">had</span> <span word="been">been</span> <span word="done">done</span> 情态动词 <span word="can">can</span>/<span word="may">may</span>/<span word="must">must</span> <span word="be">be</span> <span word="done">done</span> 不定式 <span word="to">to</span> <span word="be">be</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> 现在分词 <span word="being">being</span> <span word="done">done</span>;<span word="having">having</span> <span word="been">been</span> <span word="done">done</span> 动名词 <span word="being">being</span> <span word="done">done</span>;<span word="having">having</span> <span word="been">been</span> <span word="done">done</span> 5.用主动式表示被动含义的几种情况</p>
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