2015年职称英语考试基础语法综合复习(4)
<p> <span word="while">while</span>、<span word="when">when</span>、<span word="as">as</span>的用法区别：<span word="while">while</span>常表示一个较长的动作,它引导的从句动作与主句的动作是只能是同时发生的、是平行的;<span word="when">when</span>可以表示较短的动作也可以表示较长的动作,主句和从句的动作可以同时发生也可以先后发生;<span word="as">as</span>与上两词同义,可替换<span word="while">while</span>和<span word="when">when</span>, 表示主句和从句的动作同时发生,常译为一边一边。如：<span word="Please">Please</span> <span word="do">do</span> <span word="not">not</span> <span word="trouble">trouble</span> <span word="me">me</span> <span word="while">while</span> <span word="I">I</span> <span word="am">am</span> <span word="writing">writing</span> <span word="my">my</span> <span word="homework">homework</span>./ <span word="Ill">Ill</span> <span word="go">go</span> <span word="home">home</span> <span word="when">when</span> <span word="I">I</span> <span word="have">have</span> <span word="finished">finished</span> <span word="my">my</span> <span word="job">job</span>./ <span word="They">They</span> <span word="were">were</span> <span word="running">running</span> <span word="quickly">quickly</span> <span word="across">across</span> <span word="the">the</span> <span word="road">road</span> <span word="when">when</span> <span word="they">they</span> <span word="heard">heard</span> <span word="the">the</span> <span word="sound">sound</span> <span word="of">of</span> <span word="a">a</span> <span word="truck">truck</span> <span word="coming">coming</span>./ <span word="As">As</span> <span word="we">we</span> <span word="walked">walked</span> <span word="in">in</span> <span word="the">the</span> <span word="dark">dark</span> <span word="street">street</span>, <span word="we">we</span> <span word="sang">sang</span> <span word="songs">songs</span> <span word="and">and</span> <span word="talked">talked</span> <span word="loudly">loudly</span>.</p><p> <span word="till">till</span>/<span word="until">until</span>与<span word="nottill">nottill</span>/<span word="until">until</span>的区别：前者表示一个延续性的动作,后者表示一个才开始的动作。如：<span word="I">I</span> <span word="will">will</span> <span word="stay">stay</span> <span word="here">here</span> <span word="and">and</span> <span word="watch">watch</span> <span word="the">the</span> <span word="baby">baby</span> <span word="until">until</span> <span word="you">you</span> <span word="return">return</span>. / <span word="They">They</span> <span word="wont">wont</span> <span word="go">go</span> <span word="on">on</span> <span word="working">working</span> <span word="until">until</span> <span word="they">they</span> <span word="get">get</span> <span word="what">what</span> <span word="they">they</span> <span word="think">think</span> <span word="is">is</span> <span word="reasonable">reasonable</span>.</p><p> 另外<span word="till">till</span>与<span word="until">until</span>基本可以互换,但是在句首时只能用<span word="until">until</span>,不能用<span word="till">till</span>. 如：<span word="Until">Until</span> <span word="the">the</span> <span word="last">last</span> <span word="minute">minute</span> <span word="of">of</span> <span word="the">the</span> <span word="match">match</span> <span word="we">we</span> <span word="kept">kept</span> <span word="playing">playing</span>./ <span word="Not">Not</span> <span word="until">until</span> <span word="he">he</span> <span word="had">had</span> <span word="finished">finished</span> <span word="his">his</span> <span word="work">work</span> <span word="did">did</span> <span word="he">he</span> <span word="go">go</span> <span word="home">home</span>.</p><p> </p>
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