2016届高考英语二轮复习语法专项突破：第7节 情态动词和虚拟语气（北师大版）
<p> 第七节 情态动词和虚拟语气</p><p> 考点一</p><p> 情态动词的基本用法</p><p> 1．<span word="can">can</span></p><p> (1)表示能力。需注意的是，<span word="could">could</span>表示过去一般的能力，而<span word="was">was</span>/<span word="were">were</span> <span word="able">able</span> <span word="to">to</span>表示有能力而且成功地做成了某事。</p><p> <span word="However">However</span> <span word="great">great</span> <span word="the">the</span> <span word="difficulties">difficulties</span> <span word="may">may</span> <span word="be">be</span>，<span word="we">we</span> <span word="can">can</span> <span word="overcome">overcome</span> <span word="them">them</span>.</p><p> 哪怕是再大的困难我们也能克服。</p><p> <span word="The">The</span> <span word="fire">fire</span> <span word="spread">spread</span> <span word="through">through</span> <span word="the">the</span> <span word="building">building</span> <span word="very">very</span> <span word="quickly">quickly</span>，<span word="but">but</span> <span word="everyone">everyone</span> <span word="was">was</span> <span word="able">able</span> <span word="to">to</span> <span word="get">get</span> <span word="out">out</span>.尽管这场大火迅速蔓延了整个大楼，但是每个人都逃了出去。</p><p> (2)表示理论上的可能性，意为“有时候可能会”。</p><p> <span word="Everything">Everything</span> <span word="can">can</span> <span word="happen">happen</span>；<span word="everything">everything</span> <span word="is">is</span> <span word="possible">possible</span> <span word="and">and</span> <span word="probable">probable</span>.</p><p> 任何事情都有可能发生，没有什么是不可能的。</p><p> (3)表示请求和允许。在问句中，<span word="could">could</span>比<span word="can">can</span>语气要委婉；但答语中要用<span word="can">can</span>表示直截了当。</p><p> —<span word="Could">Could</span> <span word="I">I</span> <span word="use">use</span> <span word="your">your</span> <span word="cell">cell</span> <span word="phone">phone</span>?</p><p> ——我可以用你的手机吗？</p><p> —<span word="Of">Of</span> <span word="course">course</span> <span word="you">you</span> <span word="can">can</span>.——当然可以。</p><p> (4)表示推测，常用于疑问句和否定句。</p><p> <span word="What">What</span> <span word="can">can</span> <span word="they">they</span> <span word="be">be</span> <span word="doing">doing</span> <span word="there">there</span>?</p><p> 他们可能正在那里干什么？</p><p> <span word="He">He</span> <span word="can">can</span>'<span word="t">t</span> <span word="be">be</span> <span word="in">in</span> <span word="the">the</span> <span word="office">office</span>，<span word="for">for</span> <span word="the">the</span> <span word="light">light</span> <span word="has">has</span> <span word="been">been</span> <span word="turned">turned</span> <span word="off">off</span>.他不可能在办公室，因为灯已关了。</p>
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