情态动词
情态动词的被动语态
重要程度：4 分
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<h2>情态动词的被动语态</h2>
<p>情态动词表示能力、可能性、必要性等，当这些动作的承受者成为句子的主语时，就构成了情态动词的被动语态。</p>
<p>情态动词的被动语态结构为：情态动词 + be + 过去分词</p>
<h3>示例：</h3>
<ul>
<li><strong>can/could</strong> + be + 过去分词</li>
<p>例如：This problem <strong>can be solved</strong> by experts.</p>
<li><strong>may/might</strong> + be + 过去分词</li>
<p>例如：The book <strong>might be borrowed</strong> by someone else.</p>
<li><strong>must</strong> + be + 过去分词</li>
<p>例如：All the questions <strong>must be answered</strong> in English.</p>
<li><strong>should</strong> + be + 过去分词</li>
<p>例如：Your homework <strong>should be handed in</strong> before class ends.</p>
<li><strong>have to</strong> + be + 过去分词</li>
<p>例如：The machine <strong>has to be repaired</strong> regularly.</p>
</ul>
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