［情态动词］表示推测的用法
<p> <span word="can">can</span>， <span word="could">could</span>， <span word="may">may</span>， <span word="might">might</span>， <span word="must">must</span> 皆可表示推测，其用法如下：</p><p> 1）情态动词+动词原形，表示对现在或将来的情况的推测，此时动词通常为系动词。例如：</p><p> <span word="I">I</span> <span word="dont">dont</span> <span word="know">know</span> <span word="where">where</span> <span word="she">she</span> <span word="is">is</span>， <span word="she">she</span> <span word="may">may</span> <span word="be">be</span> <span word="in">in</span> <span word="Wuhan">Wuhan</span>. 我不知道她在哪儿，可能在武汉。</p><p> 2）情态动词+动词现在进行时，表示对现在或将来正在进行的情况进行推测。例如：</p><p> <span word="At">At</span> <span word="this">this</span> <span word="moment">moment</span>， <span word="our">our</span> <span word="teacher">teacher</span> <span word="must">must</span> <span word="be">be</span> <span word="correcting">correcting</span> <span word="our">our</span> <span word="exam">exam</span> <span word="papers">papers</span>. 这时，想必我们老师正在批改试卷。</p><p> 3）情态动词+动词完成时，表示对过去情况的推测。例如：</p><p> <span word="The">The</span> <span word="road">road</span> <span word="is">is</span> <span word="wet">wet</span>. <span word="It">It</span> <span word="must">must</span> <span word="have">have</span> <span word="rained">rained</span> <span word="last">last</span> <span word="night">night</span>. 地是湿的，昨天晚上一定下雨了。</p><p> 4）情态动词+动词的现在完成进行时，表示对过去正在发生事情的推测。例如：</p><p> <span word="Your">Your</span> <span word="mother">mother</span> <span word="must">must</span> <span word="have">have</span> <span word="been">been</span> <span word="looking">looking</span> <span word="for">for</span> <span word="you">you</span>. 你妈妈一定一直在找你。</p><p> 5）推测的否定形式，疑问形式用<span word="cant">cant</span>， <span word="couldnt">couldnt</span>表示。例如：</p><p> <span word="Mike">Mike</span> <span word="cant">cant</span> <span word="have">have</span> <span word="found">found</span> <span word="his">his</span> <span word="car">car</span>， <span word="for">for</span> <span word="he">he</span> <span word="came">came</span> <span word="to">to</span> <span word="work">work</span> <span word="by">by</span> <span word="bus">bus</span> <span word="this">this</span> <span word="morning">morning</span>.</p><p> 迈克一定还没有找回他的车，因为早上他是坐公共汽车来上班的。</p><p> 注意：<span word="could">could</span>， <span word="might">might</span>表示推测时不表示时态，其推测的程度不如<span word="can">can</span>， <span word="may">may</span>. </p><p> </p>
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