2017届高考英语（人教版）一轮复习：Book2 Unit 5 课件
<p> (3)<span word="while">while</span> 引导从句时，如果主从句的主语一致，且从句谓语又含有 <span word="be">be</span>, 则从句主语和 <span word="be">be</span> 可以省略。 <span word="while">while</span> 后可直接跟现在分词、名词、形容词或介词短语。 (4)<span word="while">while</span> 引导让步状语从句，常放在句首，意为“尽管”，比 <span word="although">although</span> 或 <span word="though">though</span> 语气轻。 (5)<span word="while">while</span> 引导条件状语从句，意为“只要”，其意思和用法相当于 <span word="as">as</span> <span word="long">long</span> <span word="as">as</span>。<span word="while">while</span> 可位于句首，也可位于句中。</p><p> 【易错提示】 <span word="while">while</span> 引导时间状语从句时，后跟延续性动词；<span word="when">when</span> 引导时间状语从句时，可以跟延续性动词，也可以跟短暂性动词。例如： ①<span word="When">When</span>/<span word="While">While</span> <span word="I">I</span> <span word="was">was</span> <span word="in">in</span> <span word="junior">junior</span> <span word="middle">middle</span> <span word="school">school</span>, <span word="I">I</span> <span word="liked">liked</span> <span word="English">English</span> <span word="very">very</span> <span word="much">much</span>. 我上初中时非常喜欢英语。 ②<span word="When">When</span> <span word="he">he</span> <span word="entered">entered</span>, <span word="I">I</span> <span word="was">was</span> <span word="watching">watching</span> <span word="TV">TV</span>. 当他进来时我正在看电视(不能用<span word="while">while</span>)。 即境活用16 <span word="Tom">Tom</span> <span word="likes">likes</span> <span word="playing">playing</span> <span word="chess">chess</span> ________ <span word="his">his</span> <span word="sister">sister</span> <span word="enjoys">enjoys</span> <span word="playing">playing</span> <span word="the">the</span> <span word="piano">piano</span>. <span word="A">A</span>．<span word="until">until</span></p><p> <span word="B">B</span>．<span word="before">before</span> <span word="C">C</span>．<span word="while">while</span></p><p> <span word="D">D</span>．<span word="after">after</span> [解析]<span word="while">while</span> 用于前后两者的对比转折，意为“然而”。 [答案]<span word="C">C</span> 2．<span word="Their">Their</span> <span word="personal">personal</span> <span word="life">life</span> <span word="was">was</span> <span word="discussed">discussed</span> <span word="by">by</span> <span word="people">people</span> <span word="who">who</span> <span word="did">did</span> <span word="not">not</span> <span word="know">know</span> <span word="them">them</span> <span word="but">but</span> <span word="talked">talked</span> <span word="as">as</span> <span word="if">if</span> <span word="they">they</span> <span word="were">were</span> <span word="friends">friends</span>. 不认识他们的人在谈论他们的私生活，而他们说起来就好像他们是朋友似的。 (1)<span word="who">who</span> <span word="did">did</span> <span word="not">not</span> <span word="know">know</span> <span word="them">them</span> 为 <span word="who">who</span> 引导的定语从句， 修饰先行词 <span word="people">people</span>; <span word="as">as</span> <span word="if">if</span> 在此引导方式状语从句，意为“好像”。 (2)<span word="as">as</span> <span word="if">if</span>/<span word="though">though</span> 引导状语从句时，从句的谓语通常用虚拟语气，表示与事实不符或相反的情况。 【易错提示】 (1)<span word="as">as</span> <span word="if">if</span>/<span word="though">though</span> 作连词，后可跟从句、分词、形容词等，引导从句时常用虚拟语气，表示与事实不符或相反的情况。 (2)与现在事实不符或相反，谓语动词常用一般过去时态(<span word="be">be</span> 用 <span word="were">were</span>)。(3)与过去事实不符或相反，谓语动词用过去完成时态。 (4)<span word="as">as</span> <span word="if">if</span>/<span word="though">though</span> 有时不接从句，而接形容词、分词、副词、不定式或介词短语等，可看作是从句的省略。 即境活用17 <span word="When">When</span> <span word="a">a</span> <span word="pencil">pencil</span> <span word="is">is</span> <span word="partly">partly</span> <span word="in">in</span> <span word="a">a</span> <span word="glass">glass</span> <span word="of">of</span> <span word="water">water</span>, <span word="it">it</span> <span word="looks">looks</span> <span word="as">as</span> <span word="if">if</span> <span word="it">it</span> ________ <span word="broken">broken</span>. <span word="A">A</span>．<span word="is">is</span></p>
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