英语语法定语从句知识点：定语从句基本概念
<p>【导语】英语语法让很多学生都头疼，因为复杂难懂的句式和词组有时难以记忆。英语网为大家整理了英语语法大全，希望对同学们的英语语法学习有所帮助。更多内容尽在英语网。</p><p>概念</p><p>被修饰的词叫先行词。定语从句不同于单词作定语的情况，它需要放在被修饰的词(即先行词)之后。定语从句一般由关系代词来引导。关系代词必须放在定语从句之首。定语从句(<span word="Attributive">Attributive</span> <span word="Clauses">Clauses</span>)在句中做定语，修饰一个名词或代词，被修饰的名词,词组或代词即先行词。定语从句通常出现在先行词之后，由关系词(关系代词或关系副词)引出。</p><p>关系代词引导的定语从句</p><p>关系代词所代替的先行词是人或物的名词或代词，并在句中充当主语、宾语、定语等成分。关系代词在定语从句中作主语时，从句谓语动词的人称和数要和先行词保持一致。</p><p>1)<span word="who">who</span>, <span word="whom">whom</span>, <span word="that">that</span></p><p>这些词代替的先行词是人的名词或代词，在从句中所起作用如下：</p><p><span word="Is">Is</span> <span word="he">he</span> <span word="the">the</span> <span word="man">man</span> <span word="who">who</span>/<span word="that">that</span> <span word="wants">wants</span> <span word="to">to</span> <span word="see">see</span> <span word="you">you</span>?</p><p>他就是想见你的人吗?(<span word="who">who</span>/<span word="that">that</span>在从句中作主语)</p><p><span word="He">He</span> <span word="is">is</span> <span word="the">the</span> <span word="man">man</span> <span word="whom">whom</span>/ <span word="that">that</span> <span word="I">I</span> <span word="saw">saw</span> <span word="yesterday">yesterday</span>.</p><p>他就是我昨天见的那个人。(<span word="whom">whom</span>/<span word="that">that</span>在从句中作宾语)</p><p>2) <span word="Whose">Whose</span> 用来指人或物，(只用作定语, 若指物，它还可以同<span word="of">of</span> <span word="which">which</span>互换), 例如：</p>
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