名词性从句中的易错点总结分析
<p>在学习名词性从句之前，我们首先要明白一个词：复合句</p><p>什么叫复合句</p><p>由一个主句和一个或一个以上的从句构成的句子叫复合句。在复合句中主句是全句的主体，从句是全句的一个成分，不能独立。从句通常是用关联词来引导的。在这里关联词还起联系从句和主句的作用。</p><p>一、从句的种类：</p><p>主语从句、宾语从句、表语从句、同位语从句，定语从句和状语从句</p><p>二、名词性从句的连接词</p><p>1. 单纯连词</p><p>在从句中不补充当任何成分，只起到连接从句的功能。</p><p><span word="that">that</span> 没有实际意义，而<span word="whether">whether</span>/ <span word="if">if</span> 在句子中表示“是否” 的意义。</p><p><span word="Eg">Eg</span> : <span word="That">That</span> <span word="the">the</span> <span word="prices">prices</span> <span word="of">of</span> <span word="rice">rice</span> <span word="will">will</span> <span word="go">go</span> <span word="up">up</span> <span word="is">is</span> <span word="certain">certain</span>. (<span word="that">that</span>引导主语从句，补充当任何成分)</p><p><span word="He">He</span> <span word="asked">asked</span> <span word="if">if</span> <span word="I">I</span> <span word="could">could</span> <span word="come">come</span> <span word="to">to</span> <span word="see">see</span> <span word="him">him</span> <span word="this">this</span> <span word="weekend">weekend</span>.</p><p>形式主语<span word="it">it</span> 代替主语从句位于句首时，常见的几种情况：</p><p>① <span word="It">It</span> + <span word="adj">adj</span> +<span word="that">that</span> 从句(大多数情况下<span word="that">that</span>从句后用<span word="should">should</span>+动词原形)</p><p><span word="Adj">Adj</span>: <span word="necessary">necessary</span> <span word="right">right</span> <span word="clear">clear</span> <span word="unlikely">unlikely</span> <span word="strange">strange</span> <span word="obvious">obvious</span> <span word="natural">natural</span> <span word="important">important</span></p><p><span word="Eg">Eg</span>: <span word="It">It</span> <span word="is">is</span> <span word="necessary">necessary</span> <span word="to">to</span> <span word="learn">learn</span> <span word="English">English</span> <span word="well">well</span>.</p><p>② <span word="It">It</span> +系动词+名词+<span word="that">that</span> 从句</p><p><span word="Non">Non</span>: <span word="a">a</span> <span word="pity">pity</span> <span word="an">an</span> <span word="honor">honor</span> <span word="good">good</span> <span word="news">news</span> <span word="a">a</span> <span word="wonder">wonder</span> <span word="a">a</span> <span word="fact">fact</span> <span word="no">no</span> <span word="wonder">wonder</span> <span word="no">no</span> <span word="surpeise">surpeise</span></p>
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