高中英语 语法精讲（Unit 15The necklace）人教版
<p> 语法精讲<span word="Modal">Modal</span> <span word="Verbs">Verbs</span>(3)情态动词—<span word="must">must</span>,<span word="can">can</span>/<span word="could">could</span>,<span word="may">may</span>/<span word="might">might</span></p><p> 1.<span word="must">must</span>,<span word="can">can</span>/<span word="could">could</span>,<span word="may">may</span>/<span word="might">might</span></p><p> 都可用来表示猜测。</p><p> 对现在和未来的事进行猜测时，后接动词原形；对已经发生的事进行猜测时，后接<span word="have">have</span> <span word="done">done</span>;对正在进行的事进行猜测时，后接<span word="be">be</span> <span word="doing">doing</span>。<span word="must">must</span>表示“一定”“肯定”，只能用于肯定句，否定句用<span word="can">can</span>’<span word="t">t</span>(不可能)。<span word="could">could</span>,<span word="may">may</span>,<span word="might">might</span> 表示“可能”。</p><p> <span word="It">It</span> <span word="must">must</span> <span word="be">be</span> <span word="the">the</span> <span word="naughty">naughty</span> <span word="boy">boy</span> <span word="crying">crying</span> <span word="outside">outside</span>.</p><p> 肯定是那个调皮的孩子在外面大叫。</p><p> <span word="I">I</span> <span word="didn">didn</span>’<span word="t">t</span> <span word="see">see</span> <span word="you">you</span> <span word="in">in</span> <span word="class">class</span> <span word="yesterday">yesterday</span>.<span word="You">You</span> <span word="must">must</span> <span word="have">have</span> <span word="been">been</span> <span word="absent">absent</span>.</p><p> 我昨天上课没见着你，你肯定没来。</p><p> <span word="He">He</span> <span word="can">can</span>’<span word="t">t</span> <span word="be">be</span> <span word="over">over</span> <span word="seventy">seventy</span>.</p><p> 他不可能有七十多岁。</p><p> <span word="Where">Where</span> <span word="could">could</span>/<span word="can">can</span> <span word="the">the</span> <span word="boy">boy</span> <span word="be">be</span> <span word="now">now</span>?</p><p> 那孩子现在能在哪儿呢？</p><p> <span word="I">I</span> <span word="may">may</span> <span word="be">be</span> <span word="busy">busy</span> <span word="from">from</span> <span word="tomorrow">tomorrow</span> <span word="on">on</span>.</p><p> 从明天起我可能会忙起来。</p><p> <span word="The">The</span> <span word="story">story</span> <span word="could">could</span>/<span word="may">may</span>/<span word="might">might</span> <span word="be">be</span> <span word="true">true</span>.</p><p> 这个故事可能是真的。</p><p> 2.<span word="can">can</span>/<span word="could">could</span></p><p> 1)<span word="can">can</span>/<span word="could">could</span>还可表示“能力”，<span word="can">can</span>表示现在的能力，<span word="could">could</span>表示过去的能力。</p><p> <span word="We">We</span> <span word="can">can</span> <span word="use">use</span> <span word="the">the</span> <span word="computer">computer</span> <span word="now">now</span>,<span word="but">but</span> <span word="we">we</span> <span word="couldn">couldn</span>’<span word="t">t</span> 10 <span word="years">years</span> <span word="ago">ago</span>.</p><p> 我们现在会使用电脑，但10年前我们不会。</p>
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