职称英语理工类语法词汇常见考点：连词难点解析
<p> <span word="A">A</span>.<span word="whether">whether</span>与<span word="if">if</span>在引导名词性从句时的区别</p><p> 1)主语从句、介词宾语从句只能用<span word="whether">whether</span>引导;</p><p> 2)<span word="whether">whether</span> 0<span word="r">r</span> <span word="not">not</span>可以连在一起用，而<span word="if">if</span> <span word="or">or</span> <span word="not">not</span>则不能，<span word="or">or</span> <span word="not">not</span>只能放在句末;</p><p> 3)在<span word="question">question</span>，<span word="ask">ask</span>后面一般只用<span word="whether">whether</span>，<span word="question">question</span>的同位语从句也用<span word="whether">whether</span>;</p><p> 4)后接不定式时，只能用<span word="whether">whether</span>。</p><p> <span word="B">B</span>.<span word="what">what</span>的用法;</p><p> <span word="C">C</span>.<span word="whoever">whoever</span>与<span word="whomever">whomever</span>分别是主格与宾格。它们的出现取决于它们在从句中作主语还是作宾语;</p><p> <span word="D">D</span>.宾语从句否定转移：动词<span word="believe">believe</span>，<span word="expect">expect</span>，<span word="fancy">fancy</span>，<span word="imagine">imagine</span>，<span word="suppose">suppose</span>，<span word="think">think</span>后的宾语从句如为否定式，一般将否定词转移到主句谓语上</p><p> 职称英语理工类<span word="AB">AB</span>级精选词汇例题解析 一</p><p> 1. <span word="we">we</span> <span word="were">were</span> <span word="all">all</span> <span word="there">there</span> <span word="when">when</span> <span word="the">the</span> <span word="accident">accident</span> <span word="occurred">occurred</span>.</p><p> <span word="a">a</span>) <span word="happened">happened</span> <span word="b">b</span>) <span word="broke">broke</span></p><p> <span word="c">c</span>) <span word="spread">spread</span> <span word="d">d</span>) <span word="appeared">appeared</span></p><p> 1.<span word="a">a</span>. <span word="occur">occur</span>是单义词， 其基本词义为发生。因此<span word="a">a</span>是答案。</p><p> 需要掌握的相关近义词词组：</p><p> <span word="happen">happen</span><span word="occur">occur</span><span word="take">take</span> <span word="place">place</span><span word="break">break</span> <span word="out">out</span> 发生</p><p> <span word="appear">appear</span><span word="seem">seem</span><span word="look">look</span> 看起来</p><p> <span word="that">that</span> <span word="dog">dog</span> <span word="looks">looks</span>/<span word="seems">seems</span>/<span word="appears">appears</span> <span word="dangerous">dangerous</span>.那只狗看起来很危险。</p><p> <span word="break">break</span>是高频动词，与其相关的短语结构是常见考察点：</p><p> <span word="break">break</span> <span word="away">away</span> 逃走;逃脱</p>
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