2017年高考英语试题分项版解析Ⅰ专题07 情态动词和虚拟语气（教师版）
<p> 解题的方法：否定句、疑问句和感叹句中，表示怀疑、惊异、不相信的态度表示“经过努力后终于能……”用<span word="be">be</span> <span word="able">able</span> <span word="to">to</span>惯用形式“<span word="can">can</span> <span word="not">not</span> (<span word="can">can</span>'<span word="t">t</span>)…<span word="too">too</span>/<span word="over">over</span>/<span word="enough">enough</span>”。表示“无论怎么……也不(过分)”，用来加强语气</p><p> <span word="can">can</span> <span word="not">not</span> <span word="but">but</span> <span word="do">do</span> <span word="sth">sth</span>. 不得不；只好<span word="can">can</span> ,<span word="may">may</span> ,<span word="must">must</span>皆可用来表示推测</p><p> 在肯定句中都可以用来表示可能。在含义上<span word="must">must</span>”语气最肯定<span word="may">may</span>”表示的是事实上的可能性。在否定句中只能用<span word="can">can</span>和<span word="may">may</span>。所以<span word="can">can</span>’<span word="t">t</span>”（不可能语气比<span word="may">may</span> <span word="not">not</span>”（可能不、也许不）更在疑问句中只能用<span word="can">can</span>”，不能用<span word="may">may</span>和<span word="must">must</span>。情态动词+<span word="have">have</span> <span word="done">done</span>的用法</p><p> <span word="could">could</span>+<span word="have">have</span> <span word="done">done</span>：本可以做而实际上未能做<span word="cannot">cannot</span>+<span word="have">have</span> <span word="done">done</span>：表示对过去行为的否定推测</p><p> <span word="can">can</span>+主语+<span word="have">have</span> <span word="done">done</span>：表示对过去行为的怀疑或不肯定</p><p> <span word="might">might</span>(<span word="may">may</span>)+ <span word="have">have</span> <span word="done">done</span>：对过去发生的行为不太肯定的推测</p><p> <span word="must">must</span>+<span word="have">have</span> <span word="done">done</span>：对过去发生的行为肯定的推测。其否定式为：<span word="cannot">cannot</span> <span word="have">have</span> <span word="done">done</span></p><p> <span word="needn">needn</span>’<span word="t">t</span>+<span word="have">have</span> <span word="done">done</span>：本来不必要做的而实际上又做了</p><p> <span word="should">should</span>(<span word="ought">ought</span> <span word="to">to</span>)+ <span word="have">have</span> <span word="done">done</span>：本来应该做而实际上又没有做。其否定形式表示某种行为不该发生发生了。</p><p> 1.(2017课标卷)30.<span word="I">I</span></p><p> _<span word="use">use</span> <span word="a">a</span> <span word="clock">clock</span> <span word="to">to</span> <span word="wake">wake</span> <span word="me">me</span> <span word="up">up</span> <span word="because">because</span> <span word="at">at</span> <span word="six">six</span> <span word="o">o</span>'<span word="clock">clock</span> <span word="each">each</span> <span word="morning">morning</span> <span word="the">the</span> <span word="train">train</span> <span word="comes">comes</span> <span word="by">by</span> <span word="my">my</span> <span word="house">house</span>.</p>
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