什么是助动词
<p>1）协助主要动词构成谓语动词词组的词叫助动词（<span word="Auxiliary">Auxiliary</span> <span word="Verb">Verb</span>）。被协助的动词称作主要动词（<span word="Main">Main</span> <span word="Verb">Verb</span>）。 </p><p>助动词自身没有词义，不可单独使用，例如： </p><p> <span word="He">He</span> <span word="doesn">doesn</span>’<span word="t">t</span> <span word="like">like</span> <span word="English">English</span>. 他不喜欢英语。 </p><p>（<span word="doesn">doesn</span>’<span word="t">t</span>是助动词，无词义；<span word="like">like</span>是主要动词，有词义) </p><p>2） 助动词协助主要动词完成以下功用，可以用来： <span word="http">http</span>://<span word="yingyu">yingyu</span>.<span word="chazidian">chazidian</span>.<span word="com">com</span></p><p> <span word="a">a</span>. 表示时态，例如： </p><p> <span word="He">He</span> <span word="is">is</span> <span word="singing">singing</span>. 他在唱歌。 </p><p> <span word="He">He</span> <span word="has">has</span> <span word="got">got</span> <span word="married">married</span>. 他已结婚。 </p><p> <span word="b">b</span>. 表示语态，例如： </p><p> <span word="He">He</span> <span word="was">was</span> <span word="sent">sent</span> <span word="to">to</span> <span word="England">England</span>. 他被派往英国。 </p><p> <span word="c">c</span>. 构成疑问句，例如： </p><p> <span word="Do">Do</span> <span word="you">you</span> <span word="like">like</span> <span word="college">college</span> <span word="life">life</span>? 你喜欢大学生活吗？ </p><p> <span word="Did">Did</span> <span word="you">you</span> <span word="study">study</span> <span word="English">English</span> <span word="before">before</span> <span word="you">you</span> <span word="came">came</span> <span word="here">here</span>? 你来这儿之前学过英语吗？ </p><p> <span word="d">d</span>. 与否定副词<span word="not">not</span>合用，构成否定句，例如： </p><p> <span word="I">I</span> <span word="don">don</span>’<span word="t">t</span> <span word="like">like</span> <span word="him">him</span>. 我不喜欢他。 </p><p> <span word="e">e</span>. 加强语气，例如： </p><p> <span word="Do">Do</span> <span word="come">come</span> <span word="to">to</span> <span word="the">the</span> <span word="party">party</span> <span word="tomorrow">tomorrow</span> <span word="evening">evening</span>. 明天晚上一定来参加晚会。 </p><p> <span word="He">He</span> <span word="did">did</span> <span word="know">know</span> <span word="that">that</span>. 他的确知道那件事。 </p><p>3） 最常用的助动词有：<span word="be">be</span>, <span word="have">have</span>, <span word="do">do</span>, <span word="shall">shall</span>, <span word="will">will</span>, <span word="should">should</span>, <span word="would">would</span> </p></p>
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