句型宝典否定句型8
<p><span word="A">A</span>+<span word="Positive">Positive</span>，<span word="but">but</span> <span word="B">B</span>+<span word="Negative">Negative</span></p><p>结构︰<span word="A">A</span>(主词)+肯定(或否定)，<span word="but">but</span>+<span word="B">B</span>(主词)+否定(或肯定)。</p><p>说明︰此句型意为<span word="A">A</span>，但是 <span word="B">B</span> 不(或：<span word="A">A</span> 不，但是 <span word="B">B</span>)。<span word="but">but</span> 是连接词，用于表示相反或对比，故 <span word="but">but</span> 可连接一个肯定子句与一个否定子句本句型中 助动词要与一般动词时态相一致。</p><p><span word="Mr">Mr</span>. <span word="Collins">Collins</span> <span word="was">was</span> <span word="tired">tired</span>， <span word="but">but</span> <span word="Mr">Mr</span>. <span word="Smith">Smith</span> <span word="wasnt">wasnt</span>. 柯林斯先生累了，但是史密斯先生不累。</p><p><span word="It">It</span> <span word="wont">wont</span> <span word="hurt">hurt</span> <span word="you">you</span>， <span word="but">but</span> <span word="chemicals">chemicals</span> <span word="will">will</span>. 它不会伤害你，但是农药会。</p><p><span word="Mr">Mr</span>. <span word="Chen">Chen</span> <span word="knows">knows</span> <span word="this">this</span>， <span word="but">but</span> <span word="other">other</span> <span word="people">people</span> <span word="dont">dont</span>. 陈先生知道这件事，但是别人不知道。</p><p><span word="He">He</span> <span word="made">made</span> <span word="more">more</span> <span word="money">money</span>， <span word="but">but</span> <span word="I">I</span> <span word="didnt">didnt</span>. 他赚了更多的钱，但是我没有。</p><p><span word="My">My</span> <span word="sister">sister</span> <span word="eats">eats</span> <span word="natural">natural</span> <span word="foods">foods</span> <span word="every">every</span> <span word="day">day</span>， <span word="but">but</span> <span word="I">I</span> <span word="dont">dont</span>.</p><p>我妹妹每天都吃天然食品，但是我不吃。</p><p><span word="when">when</span>/<span word="as">as</span>/<span word="while">while</span></p><p>结构︰主要子句+<span word="when">when</span>/<span word="as">as</span>/<span word="while">while</span>+子句</p><p>说明︰此句型意为当时。<span word="when">when</span> 引导的子句，不仅说明一般时间，而且可以表示与主要子句同时或提前的动作时间。两个动词常用现在式。 <span word="as">as</span> 所表示的同时意义更突出一些，语意更强一些;<span word="while">while</span> 多指动作的过程，时间范围较大一些。连接词 <span word="while">while</span> 后面的主词，如果与主要子句主词相同时，<span word="while">while</span> 后面的主词与 <span word="be">be</span> 动词可以省略，如例句8.</p>
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