2017届高三英语一轮语法专项真题：情态动词和虚拟语气
<p> 情态动词和虚拟语气</p><p> 【2017新课标全国卷<span word="II">II</span>】6．<span word="Since">Since</span> <span word="nobody">nobody</span> <span word="gave">gave</span> <span word="him">him</span> <span word="any">any</span> <span word="help">help</span>，<span word="he">he</span> ________ <span word="have">have</span> <span word="done">done</span> <span word="the">the</span> <span word="research">research</span> <span word="on">on</span> <span word="his">his</span> <span word="own">own</span>.</p><p> <span word="A">A</span>．<span word="can">can</span></p><p> <span word="B">B</span>．<span word="must">must</span></p><p> <span word="C">C</span>．<span word="would">would</span></p><p> <span word="D">D</span>．<span word="need">need</span></p><p> 【解析】 分析主从句逻辑关系，主句是对从句表达的原因的一种猜测，<span word="must">must</span> <span word="have">have</span> <span word="done">done</span>想必/准是/一定做过某事，符合主从句之间的逻辑关系。本题句意为“既然没人给他帮忙，那他肯定是自己做的研究。”<span word="can">can</span> <span word="have">have</span> <span word="done">done</span>用于疑问句或否定句中，表示对过去情况的推测；<span word="would">would</span> <span word="have">have</span> <span word="done">done</span>表示过去将来完成时或用于虚拟语气中；<span word="need">need</span> <span word="have">have</span> <span word="done">done</span>通常用于否定句和疑问句中，表示“本不必做某事却做了”。【答案】 <span word="B">B</span></p><p> 35．—<span word="You">You</span> <span word="needn">needn</span>'<span word="t">t</span> <span word="take">take</span> <span word="an">an</span> <span word="umbrella">umbrella</span>. <span word="It">It</span> <span word="isn">isn</span>'<span word="t">t</span> <span word="going">going</span> <span word="to">to</span> <span word="rain">rain</span>.</p><p> —<span word="Well">Well</span>, <span word="I">I</span> <span word="don">don</span>'<span word="t">t</span> <span word="know">know</span>. <span word="It">It</span>________<span word="do">do</span>.</p><p> <span word="A">A</span>．<span word="might">might</span></p><p> <span word="B">B</span>．<span word="need">need</span></p><p> <span word="C">C</span>．<span word="would">would</span></p><p> <span word="D">D</span>．<span word="should">should</span></p><p> 【解析】 题干的意思是：“你不必带伞。不会下雨的。”“哦，我不知道。也可能会下。”<span word="might">might</span>或许，可能，表示有一定的可能性；<span word="need">need</span>必要，需要；<span word="would">would</span>会，表示意愿；<span word="should">should</span>应该，表示义务。由<span word="I">I</span> <span word="don">don</span>'<span word="t">t</span> <span word="know">know</span>可知，此处不确定，有一定的可能性，用<span word="might">might</span>，故<span word="A">A</span>项正确。掌握题干中的关键信息(如<span word="I">I</span>'<span word="m">m</span> <span word="not">not</span> <span word="sure">sure</span>，<span word="I">I</span> <span word="don">don</span>'<span word="t">t</span> <span word="know">know</span>等不确定的语气)是解题的关键。【答案】 <span word="A">A</span></p>
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