and和or的区别
<p>一、在否定句中的用法比较</p><p>在通常情况下，在肯定句中用<span word="and">and</span>，相应的否定句中则用 <span word="or">or</span>。如：</p><p><span word="He">He</span> <span word="has">has</span> <span word="brothers">brothers</span> <span word="and">and</span> <span word="sisters">sisters</span>. 他有兄弟姐妹。</p><p><span word="He">He</span> <span word="has">has</span> <span word="no">no</span> <span word="brothers">brothers</span> <span word="or">or</span> <span word="sisters">sisters</span>. 他既没有兄弟也没有姐妹。</p><p><span word="They">They</span> <span word="sang">sang</span> <span word="and">and</span> <span word="danced">danced</span>. 他们既唱歌又跳舞(即载歌载舞)。</p><p><span word="They">They</span> <span word="didn">didn</span>&<span word="rsquo">rsquo</span>;<span word="t">t</span> <span word="sing">sing</span> <span word="or">or</span> <span word="dance">dance</span>. 他们既没有唱歌也没有跳舞。</p><p>但是，在某些特殊情况下，即使是否定句也得用<span word="and">and</span>。如：</p><p><span word="Drivers">Drivers</span> <span word="must">must</span> <span word="not">not</span> <span word="drink">drink</span> <span word="and">and</span> <span word="drive">drive</span>. 司机不准酒后驾车。</p><p>若将此句中的 <span word="and">and</span> 改为 <span word="or">or</span>，反而不合理了：</p><p><span word="Drivers">Drivers</span> <span word="must">must</span> <span word="not">not</span> <span word="drink">drink</span> <span word="or">or</span> <span word="drive">drive</span>. 司机不准开车或饮酒。</p><p>又如，汉语中有个成语叫&<span word="ldquo">ldquo</span>;鱼和熊掌不可兼得，译成英语是 <span word="can">can</span>&<span word="rsquo">rsquo</span>;<span word="t">t</span> <span word="have">have</span> <span word="one">one</span>&<span word="rsquo">rsquo</span>;<span word="s">s</span> <span word="cake">cake</span> <span word="and">and</span> <span word="eat">eat</span> <span word="it">it</span>，在该否定结构中也应用 <span word="and">and</span>，不用 <span word="or">or</span>，否则不合情理：</p><p><span word="You">You</span> <span word="want">want</span> <span word="a">a</span> <span word="regular">regular</span> <span word="income">income</span> <span word="but">but</span> <span word="don">don</span>&<span word="rsquo">rsquo</span>;<span word="t">t</span> <span word="want">want</span> <span word="to">to</span> <span word="work">work</span>. <span word="Don">Don</span>&<span word="rsquo">rsquo</span>;<span word="t">t</span> <span word="forget">forget</span>: <span word="you">you</span> <span word="can">can</span>&<span word="rsquo">rsquo</span>;<span word="t">t</span> <span word="have">have</span> <span word="your">your</span> <span word="cake">cake</span> <span word="and">and</span> <span word="eat">eat</span> <span word="it">it</span>! 你既想有稳定的收入，又不想工作。别忘了，鱼和熊掌不可兼得呀!</p><p>二、在祈使句中的用法比较</p><p><span word="and">and</span> 和 <span word="or">or</span> 均可用于祈使句后表示结果(即暗示后面的陈述句为前面祈使句的结果)，注意两者意思不同：<span word="and">and</span> 意为&<span word="ldquo">ldquo</span>;那么，<span word="or">or</span> 意为&<span word="ldquo">ldquo</span>;否则。如：</p>
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