2017高考英语备考复习课件：情态动词的复习
<p> 情态动词<span word="must">must</span>, <span word="can">can</span>, <span word="could">could</span>,</p><p> <span word="may">may</span>, <span word="might">might</span>表推测的用法： 情态动词中的<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>都表推测。其中<span word="must">must</span>的可能性最大，<span word="can">can</span> / <span word="could">could</span>次之，<span word="may">may</span> / <span word="might">might</span>最小。具体用法如下： 1. <span word="must">must</span>的用法 （1）表示推测“可能性”时，意思是“一定、准是”，语气较肯定，较有把握。 <span word="He">He</span> <span word="must">must</span> <span word="be">be</span> <span word="American">American</span>. = <span word="It">It</span> <span word="is">is</span> <span word="certain">certain</span> <span word="that">that</span> <span word="he">he</span> <span word="is">is</span> <span word="American">American</span>. 他准是个美国人。 （2）<span word="must">must</span>表推测只能用于肯定句。 如表示“一定不、肯定不”的意思时，应用<span word="can">can</span>`<span word="t">t</span>, 如询问某种可能时，应用<span word="can">can</span>。 <span word="He">He</span> <span word="must">must</span> <span word="know">know</span> <span word="my">my</span> <span word="address">address</span>. 他肯定知道我的地址。（一定） <span word="He">He</span> <span word="can">can</span>`<span word="t">t</span> <span word="know">know</span> <span word="my">my</span> <span word="address">address</span>. 他肯定不知道我的地址。（一定不） <span word="Can">Can</span> <span word="he">he</span> <span word="know">know</span> <span word="my">my</span> <span word="address">address</span>? 他知道我的地址吗？（询问可能性） （3）<span word="must">must</span>表示推测时，可以推测现在/正在发生的动作/过去发生的动作。 <span word="He">He</span> <span word="must">must</span> <span word="have">have</span> <span word="a">a</span> <span word="car">car</span> <span word="now">now</span>. （现在）他一定有辆小汽车。 <span word="He">He</span> <span word="must">must</span> <span word="be">be</span> <span word="doing">doing</span> <span word="his">his</span> <span word="exercises">exercises</span> <span word="in">in</span> <span word="the">the</span> <span word="classroom">classroom</span>.（正在进行）他一定在教室里做练习。 <span word="He">He</span> <span word="must">must</span> <span word="have">have</span> <span word="finished">finished</span> <span word="the">the</span> <span word="work">work</span>.（过去发生）他一定已完成了工作。 注：<span word="must">must</span>表示推测时很少用于将来的情况。一般不用<span word="He">He</span> <span word="must">must</span> <span word="come">come</span> <span word="tomorrow">tomorrow</span>.可用<span word="It">It</span>`<span word="s">s</span> <span word="certain">certain</span> / <span word="I">I</span>`<span word="m">m</span> <span word="sure">sure</span> <span word="that">that</span> <span word="he">he</span> <span word="will">will</span> <span word="come">come</span> <span word="tomorrow">tomorrow</span>. （4）在反意疑问句中，当附属部分含有表示推测意义的<span word="must">must</span>时，疑问部分的助动词应与<span word="must">must</span>后面的动词在非推测情况下的用法保持一致。 <span word="He">He</span> <span word="must">must</span> <span word="be">be</span> <span word="a">a</span> <span word="worker">worker</span>, <span word="isn">isn</span>`<span word="t">t</span> <span word="he">he</span>? （现在）他准时个工人，是吗？ <span word="You">You</span> <span word="must">must</span> <span word="have">have</span> <span word="learned">learned</span> <span word="English">English</span> <span word="for">for</span> <span word="many">many</span> <span word="years">years</span>, <span word="haven">haven</span>`<span word="t">t</span> <span word="you">you</span>? （完成时）你一定学了好多年英语，是吗？ 比较： <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>, <span word="didn">didn</span>`<span word="t">t</span> <span word="it">it</span>? （过去）昨晚一定下雨了，是不是？ <span word="He">He</span> <span word="must">must</span> <span word="have">have</span> <span word="arrived">arrived</span> <span word="by">by</span> <span word="yesterday">yesterday</span> <span word="morning">morning</span>, <span word="hadn">hadn</span>’<span word="t">t</span> <span word="he">he</span>? 2. <span word="can">can</span> / <span word="could">could</span>的用法 （1）<span word="can">can</span>表示推测“可能性”时，往往用于否定句或疑问句。<span word="Can">Can</span>`<span word="t">t</span>“一定不”，<span word="can">can</span>在疑问句中意思是“会、可能”。 <span word="He">He</span> <span word="can">can</span>`<span word="t">t</span> <span word="be">be</span> <span word="at">at</span> <span word="home">home</span>. = <span word="It">It</span> <span word="is">is</span> <span word="impossible">impossible</span> <span word="that">that</span> <span word="he">he</span> <span word="is">is</span> <span word="at">at</span> <span word="home">home</span>. 他一定不在家。 （2）<span word="can">can</span> /<span word="can">can</span>`<span word="t">t</span>+ <span word="have">have</span> <span word="done">done</span>，表示对过去发生的动作进行推测。 <span word="He">He</span> <span word="can">can</span>`<span word="t">t</span> <span word="have">have</span> <span word="gone">gone</span> <span word="to">to</span> <span word="Shanghai">Shanghai</span> <span word="for">for</span> <span word="I">I</span> <span word="saw">saw</span> <span word="him">him</span> <span word="a">a</span> <span word="minute">minute</span> <span word="ago">ago</span>. 他不可能去了上海，我刚才还看见他。 <span word="It">It</span>`<span word="s">s</span> <span word="so">so</span> <span word="late">late</span>. <span word="Where">Where</span> <span word="can">can</span> <span word="she">she</span> <span word="have">have</span> <span word="gone">gone</span>? 天晚了，她可能去哪儿了呢？ （3）<span word="could">could</span> 还可以用于表示客气、委婉、礼貌的请求语气。</p>
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