非谓语动词
非谓语动词的基本形式
重要程度：8 分
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<h2>非谓语动词的基本形式</h2>
<p>非谓语动词主要有三种基本形式：不定式、动名词和分词。</p>
<h3>1. 不定式</h3>
<p>不定式由“to + 动词原形”构成。</p>
<ul>
<li>主动形式：to do</li>
<li>被动形式：to be done</li>
</ul>
<h4>举例：</h4>
<ul>
<li>She likes to read books. (主动)</li>
<li>The book needs to be read. (被动)</li>
</ul>
<h3>2. 动名词</h3>
<p>动名词是动词的-ing形式，具有名词的功能。</p>
<ul>
<li>主动形式：doing</li>
<li>被动形式：being done</li>
</ul>
<h4>举例：</h4>
<ul>
<li>Reading books is fun. (主动)</li>
<li>The book being read by her is interesting. (被动)</li>
</ul>
<h3>3. 分词</h3>
<p>分词分为现在分词和过去分词，分别表示正在进行的动作和完成的动作。</p>
<ul>
<li>现在分词：doing</li>
<li>过去分词：done</li>
</ul>
<h4>举例：</h4>
<ul>
<li>Reading the book, she smiled. (主动，正在进行)</li>
<li>The book read by her was interesting. (被动，已经完成)</li>
</ul>
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