2017届高三英语二轮复习 句型4
<p> 句型</p><p> <span word="They">They</span> <span word="lived">lived</span> <span word="on">on</span> <span word="the">the</span> <span word="earth">earth</span> <span word="tens">tens</span> <span word="of">of</span> <span word="millions">millions</span> <span word="of">of</span> <span word="years">years</span> <span word="ago">ago</span>, <span word="long">long</span></p><p> <span word="before">before</span> <span word="humans">humans</span> <span word="came">came</span> <span word="into">into</span> <span word="being">being</span>...</p><p> 千百万年前它们(恐龙)就在地球上生活，比人类的出现要早得多……</p><p> <span word="long">long</span> <span word="before">before</span> 早在……之前很久</p><p> <span word="before">before</span>可做连词，，，。<span word="long">long</span> <span word="before">before</span> 。“不久以后”，相当于 <span word="soon">soon</span> <span word="after">after</span>/<span word="shortly">shortly</span> <span word="after">after</span>, 既可以指将来，也可以指过去，所以与过去时或将来时连用，在句中做状语，不可以引导从句。</p><p> (2)<span word="long">long</span> <span word="ago">ago</span> (现在的)很久以前。</p><p> (3)“<span word="It">It</span> <span word="will">will</span> <span word="be">be</span> <span word="long">long</span> <span word="before">before</span>＋从句(一般现在时)”与 “<span word="It">It</span> <span word="was">was</span> <span word="long">long</span> <span word="before">before</span>＋从句(一般过去时)”的意思是“过很久才……”，强调经过的时间长。</p><p> (4)“<span word="It">It</span> <span word="will">will</span> <span word="not">not</span> <span word="be">be</span> <span word="long">long</span> <span word="before">before</span>＋从句(一般现在时)”与“<span word="It">It</span> <span word="was">was</span> <span word="not">not</span> <span word="long">long</span> <span word="before">before</span>＋从句(一般过去时)”，意思是“没过很久就……”，强调经过的时间短。</p><p> 注意：以上短语、句型中的 <span word="long">long</span>均可以改用普通的时间名词或短语，表达不同的时间长度。</p><p> ①<span word="Long">Long</span> <span word="before">before</span>, <span word="there">there</span> <span word="was">was</span> <span word="a">a</span> <span word="big">big</span> <span word="museum">museum</span> <span word="here">here</span>.</p><p> 很久以前，这里有一座大博物馆。</p><p> ②<span word="I">I</span> <span word="had">had</span> <span word="heard">heard</span> <span word="of">of</span> <span word="him">him</span> <span word="long">long</span> <span word="before">before</span> <span word="I">I</span> <span word="came">came</span> <span word="here">here</span>.</p><p> 早在我来这儿很久以前我就听说过他的情况。</p><p> ③<span word="Before">Before</span> <span word="long">long</span> <span word="he">he</span> <span word="went">went</span> <span word="to">to</span> <span word="Canada">Canada</span> <span word="to">to</span> <span word="go">go</span> <span word="on">on</span> <span word="with">with</span> <span word="his">his</span> <span word="further">further</span> <span word="education">education</span>.不久以后他就去加拿大继续深造了。</p>
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