定语从句详解：who、whom、whose、which、that引导的定语从句
<p>一、定语从句基本概念</p><p>定语从句通常在英语复合句中充当定语的作用，在简单句中，定语往往用来修饰代词、名词或名词性短语,例:</p><p><span word="Tom">Tom</span> <span word="is">is</span> <span word="a">a</span> <span word="handsome">handsome</span> <span word="boy">boy</span>. <span word="Tom">Tom</span>是个英俊的男孩。</p><p><span word="There">There</span> <span word="is">is</span> <span word="a">a</span> <span word="good">good</span> <span word="boy">boy</span>. 有个乖男孩。</p><p>将以上的两句转换为定语从句则为：</p><p><span word="Tom">Tom</span> <span word="is">is</span> <span word="the">the</span> <span word="boy">boy</span> <span word="who">who</span> <span word="is">is</span> <span word="handsome">handsome</span>.</p><p><span word="There">There</span> <span word="is">is</span> <span word="a">a</span> <span word="boy">boy</span> <span word="who">who</span> <span word="is">is</span> <span word="good">good</span>.</p><p>二、定语从句中两大要素</p><p>了解了定语的作用之后，现在进入定语从句的正式学习。想要辨别定语从句，必须了解定语从句的两大要素：关系代词(或关系副词)、先行词。</p><p>本节重点讲解由关系代词引导的定语从句，下一节将为大家带来关系副词引导的定语从句。</p><p>首先为大家简单例举一个定语从句。</p><p><span word="He">He</span> <span word="is">is</span> <span word="a">a</span> <span word="good">good</span> <span word="person">person</span> <span word="who">who</span> <span word="would">would</span> <span word="like">like</span> <span word="to">to</span> <span word="help">help</span> <span word="anyone">anyone</span>. 他是一个好人，肯帮助任何人。</p><p>其中<span word="person">person</span>就是先行词，<span word="who">who</span>则为关系代词</p><p><span word="who">who</span>是用来指代这个先行词<span word="person">person</span>，因此称为关系代词。此外，<span word="who">who</span>只能做“人”关系代词，比如<span word="boy">boy</span>、<span word="girl">girl</span>、<span word="people">people</span>等。</p><p>除了<span word="who">who</span>之外，关系代词还有<span word="whom">whom</span>、<span word="whose">whose</span>、<span word="which">which</span>、<span word="that">that</span></p><p>其中，值得注意的是，当定语从句修饰一个“人”时，选择关系代词必须了解先行词在从句中的位置才能做出决定，我们可以用拆分复合句的方法来判断。例：</p>
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