湖南省株洲四中高三英语牛津依林版《when》专项练习
<p> 一、状语从句中的<span word="when">when</span></p><p> <span word="when">when</span>用作从属连词，引导时间状语从句，意为“当……的时候”，从句的谓语可以是延续性动词或非延续性动词。<span word="when">when</span>引导的时间状语从句要用一般现在时(或现在完成时)代替将来时。</p><p> <span word="Because">Because</span> <span word="of">of</span> <span word="the">the</span> <span word="heavy">heavy</span> <span word="traffic">traffic</span>, <span word="it">it</span> <span word="was">was</span> <span word="already">already</span> <span word="time">time</span> <span word="for">for</span> <span word="lunch">lunch</span> <span word="break">break</span> _____ <span word="she">she</span> <span word="got">got</span> <span word="to">to</span> <span word="her">her</span> <span word="office">office</span>. (2010四川)</p><p> <span word="A">A</span>. <span word="since">since</span> <span word="B">B</span>. <span word="that">that</span></p><p> <span word="C">C</span>. <span word="when">when</span></p><p> <span word="D">D</span>. <span word="until">until</span></p><p> <span word="C">C</span>。句意：因为交通拥挤，当她到达办公室时已是午休时间了。<span word="when">when</span>引导时间状语从句，意为“当……的时候”，符合句意。</p><p> 此外，<span word="when">when</span>还可以引导条件、原因、让步等状语从句。</p><p> <span word="How">How</span> <span word="can">can</span> <span word="you">you</span> <span word="expect">expect</span> <span word="to">to</span> <span word="learn">learn</span> <span word="anything">anything</span> _____ <span word="you">you</span> <span word="never">never</span> <span word="listen">listen</span>? (2006山东)</p><p> <span word="A">A</span>. <span word="in">in</span> <span word="case">case</span> <span word="B">B</span>. <span word="even">even</span> <span word="if">if</span> <span word="C">C</span>. <span word="unless">unless</span> <span word="D">D</span>. <span word="when">when</span></p><p> <span word="D">D</span>。<span word="when">when</span>意为“既然，考虑到”，符合句意。<span word="in">in</span> <span word="case">case</span>以免，以防；<span word="even">even</span> <span word="if">if</span>即使；<span word="unless">unless</span>除非。</p><p> <span word="when">when</span></p><p> <span word="when">when</span>用作并列连词，意为“正在这时；突然”，常用在以下句式中：</p><p> (1) 过去进行时(延续性动词)+<span word="when">when</span>+一般过去时，意为“正在做某事，这时发生了另外一件事”；(2) <span word="be">be</span> <span word="about">about</span> <span word="to">to</span> <span word="do">do</span>… <span word="when">when</span>+一般过去时，意为“正要做某事，这时发生了另外一件事”；(3) 过去完成时(非延续性动词)+<span word="when">when</span>+一般过去时，意为 “刚刚做完某事，突然发生了另外一事”。</p>
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