考研英语的语法速成：谓语动词用单数的情况
<p> 1.动名词短语、不定式短语、名词性从句做主语，谓语用单数。如：</p><p> <span word="Buying">Buying</span> <span word="clothes">clothes</span> <span word="is">is</span> <span word="often">often</span> <span word="a">a</span> <span word="time">time</span>-<span word="consuming">consuming</span> <span word="job">job</span> <span word="because">because</span> <span word="those">those</span> <span word="clothes">clothes</span> <span word="that">that</span> <span word="a">a</span> <span word="person">person</span> <span word="likes">likes</span> <span word="are">are</span> <span word="rarely">rarely</span> <span word="the">the</span> <span word="cones">cones</span> <span word="that">that</span> <span word="fit">fit</span> <span word="him">him</span> <span word="or">or</span> <span word="her">her</span>.</p><p> <span word="To">To</span> <span word="understand">understand</span> <span word="the">the</span> <span word="situation">situation</span> <span word="completely">completely</span> <span word="requires">requires</span> <span word="more">more</span> <span word="thought">thought</span> <span word="than">than</span> <span word="has">has</span> <span word="been">been</span> <span word="given">given</span> <span word="thus">thus</span> <span word="far">far</span>.</p><p> 2.表示时间、距离、金额、重量、面积、体积、容积等度量的名词短语做主语时，谓语用单数。</p><p> <span word="Two">Two</span> <span word="weeks">weeks</span> <span word="was">was</span> <span word="too">too</span> <span word="long">long</span></p><p> <span word="Five">Five</span> <span word="times">times</span> <span word="five">five</span> <span word="makes">makes</span> <span word="twenty">twenty</span> <span word="five">five</span></p><p> 3.一般用<span word="and">and</span>连接的两个单词或短语做主语时候，谓语用复数，但是下面用<span word="and">and</span>连接的主语表示一个概念，谓语用单数：</p><p> <span word="law">law</span> <span word="and">and</span> <span word="order">order</span> 法制 <span word="soap">soap</span> <span word="and">and</span> <span word="water">water</span> 肥皂水</p><p> <span word="a">a</span> <span word="cup">cup</span> <span word="and">and</span> <span word="saucer">saucer</span> 茶杯碟子 <span word="fork">fork</span> <span word="and">and</span> <span word="knife">knife</span> 刀叉</p><p> <span word="the">the</span> <span word="needle">needle</span> <span word="and">and</span> <span word="thread">thread</span> 针线 <span word="trial">trial</span> <span word="and">and</span> <span word="error">error</span> 反复尝试，不断摸索</p><p> <span word="horse">horse</span> <span word="and">and</span> <span word="carriage">carriage</span> 马车 <span word="time">time</span> <span word="and">and</span> <span word="tide">tide</span> 岁月</p><p> <span word="bread">bread</span> <span word="and">and</span> <span word="butter">butter</span> 奶油面包 <span word="the">the</span> <span word="ebb">ebb</span> <span word="and">and</span> <span word="flow">flow</span> 盛衰，潮涨潮落</p><p> 如： <span word="If">If</span> <span word="law">law</span> <span word="and">and</span> <span word="order">order</span> <span word="not">not</span> <span word="preserved">preserved</span>, <span word="neither">neither</span> <span word="the">the</span> <span word="citizen">citizen</span> <span word="nor">nor</span> <span word="his">his</span> <span word="property">property</span> <span word="is">is</span> <span word="safe">safe</span>.</p><p> <span word="A">A</span>. <span word="is">is</span> <span word="B">B</span>. <span word="are">are</span> <span word="C">C</span>. <span word="was">was</span> <span word="d">d</span>. <span word="were">were</span></p><p> 答案：<span word="A">A</span>。</p><p> 4.表示学科和某些疾病名称的名词是复数形式，作主语时候谓语动词用单数形式</p>
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