基础英语讲座【22】
<p> 【<span word="What">What</span> <span word="are">are</span> <span word="you">you</span> <span word="doing">doing</span>? <span word="I">I</span> <span word="am">am</span> <span word="working">working</span>.】</p><p> <span word="What">What</span> <span word="are">are</span> <span word="you">you</span> <span word="doing">doing</span>?<span word="I">I</span> <span word="am">am</span> <span word="working">working</span>.你在干什么?我在工作。这是一个现在进行时的句型，表示现在正在进行着某种事情，其构成形式是助动词<span word="be">be</span>+动词-<span word="ing">ing</span>.动词-<span word="ing">ing</span>是动词的分词形式，动词<span word="be">be</span>要根据主语人称进行变化，例如：</p><p> <span word="The">The</span> <span word="little">little</span> <span word="boy">boy</span> <span word="is">is</span> <span word="cleaning">cleaning</span> <span word="the">the</span> <span word="classroom">classroom</span>.</p><p> 小男孩正在打扫教室。</p><p> <span word="They">They</span> <span word="are">are</span> <span word="eating">eating</span> <span word="eggs">eggs</span>.</p><p> 他们正在吃鸡蛋。</p><p> <span word="They">They</span> <span word="are">are</span> <span word="writing">writing</span> <span word="on">on</span> <span word="the">the</span> <span word="blackboard">blackboard</span>.</p><p> 他们在黑板上写字。</p><p> 【动词的分词形式】</p><p> 一般情况下，在动词的词尾加上-<span word="ing">ing</span>.例如：</p><p> <span word="go">go</span> <span word="going">going</span></p><p> <span word="work">work</span> <span word="working">working</span></p><p> <span word="read">read</span> <span word="reading">reading</span></p><p> 以不发音的字母<span word="e">e</span>结尾的动词在构成现在分词时，要先去掉<span word="e">e</span>，再加上-<span word="ing">ing</span>.例如：</p><p> <span word="write">write</span> <span word="writing">writing</span></p><p> <span word="make">make</span> <span word="making">making</span></p><p> <span word="take">take</span> <span word="taking">taking</span></p><p> 以重读闭音节结尾的单词，一个元音加一个辅音结尾，其构成形式，先双写辅音字母，再加-<span word="ing">ing</span>.例如：</p><p> <span word="put">put</span> <span word="putting">putting</span></p><p> <span word="run">run</span> <span word="running">running</span></p><p> <span word="get">get</span> <span word="getting">getting</span></p><p> 【一般现在时的构成】</p><p> 一般现在时的构成是：<span word="be">be</span> +现在分词。例如：</p>
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