2017届高考英语二轮专题复习 精品之必备词汇辨析（九）
<p> 2017届高考英语二轮专题复习精品之必备词汇辨析1、<span word="if">if</span> <span word="only">only</span>, <span word="only">only</span> <span word="if">if</span></p><p> 由这两个词组引导的条件从句虽然都可以用来表示主句所需要的 "条件"，但是两者在表示说话人的语义意图方面却有差异。1. <span word="only">only</span> <span word="if">if</span> 引起的条件状语从句，是一个对“条件”限制更严的“限制性条件状语从句”，表示“只有...(才)；只有在...的时候，唯一的条件是...”的意思；与<span word="if">if</span>引起的一般条件句相比，它有一种增强主句语势的作用。</p><p> 例如：<span word="He">He</span> <span word="will">will</span> <span word="succeed">succeed</span> <span word="only">only</span> <span word="if">if</span> <span word="he">he</span> <span word="does">does</span> <span word="his">his</span> <span word="best">best</span>.他只有尽力而为才能成功。<span word="I">I</span>'<span word="ll">ll</span> <span word="come">come</span> <span word="only">only</span> <span word="if">if</span> <span word="you">you</span> <span word="really">really</span> <span word="need">need</span> <span word="me">me</span>.只有当你真正需要我的时候，我才来。<span word="Only">Only</span> <span word="if">if</span> <span word="the">the</span> <span word="case">case</span> <span word="is">is</span> <span word="urgent">urgent</span> <span word="should">should</span> <span word="you">you</span> <span word="call">call</span> <span word="out">out</span> <span word="the">the</span> <span word="doctor">doctor</span> <span word="in">in</span> <span word="the">the</span> <span word="middle">middle</span> <span word="of">of</span> <span word="the">the</span> <span word="night">night</span>.只有患者情况紧急时，你才可以在半夜叫医生看病。</p><p> <span word="if">if</span> <span word="only">only</span>引导的条件句，通常用来表示说话人对某事所寄予的某种强烈愿望，相当于<span word="as">as</span> <span word="long">long</span> <span word="as">as</span>。它可以独立使用，用来表示由于客观条件限制，为某事不大可能或完全不可能实现而感到惋惜或遗憾的复杂心情，常用虚拟语气。</p><p> 例如：<span word="If">If</span> <span word="only">only</span> <span word="I">I</span> <span word="were">were</span> <span word="as">as</span> <span word="clever">clever</span> <span word="as">as</span> <span word="you">you</span>！要是我像你一样聪明该多好啊！<span word="If">If</span> <span word="only">only</span> <span word="you">you</span> <span word="had">had</span> <span word="not">not</span> <span word="told">told</span> <span word="Tom">Tom</span> <span word="what">what</span> <span word="I">I</span> <span word="said">said</span>, <span word="everything">everything</span> <span word="would">would</span> <span word="have">have</span> <span word="been">been</span> <span word="all">all</span> <span word="right">right</span>. 要是你没有把我的话告诉汤姆就好了，那样就不会出什么问题了。<span word="It">It</span> <span word="is">is</span> <span word="hard">hard</span> <span word="to">to</span> <span word="avoid">avoid</span> <span word="mistakes">mistakes</span>; <span word="if">if</span> <span word="only">only</span> <span word="they">they</span> <span word="are">are</span> <span word="conscientiously">conscientiously</span> <span word="corrected">corrected</span>, <span word="it">it</span> <span word="will">will</span> <span word="be">be</span> <span word="all">all</span> <span word="right">right</span>.错误总是难免的，只要认真地改正，也就好了。</p>
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