职称英语备考攻略：现在进行时的构成及应用
<p> 1. 现在进行时的概念</p><p> 现在进行时表示现在或当前一般时间正在进行的动作。可以表示有计划的未来。</p><p> 2. 现在进行时的构成</p><p> 现在进行时的构成是:主语+<span word="be">be</span>+动词<span word="ing">ing</span>〔现在分词〕形式</p><p> <span word="be">be</span>应为助动词，初学者最容易漏掉，它应与主语的人称和数保持一致。</p><p> 第一人称单数 <span word="I">I</span>+<span word="am">am</span>+<span word="doing">doing</span>+<span word="sth">sth</span></p><p> 第一人称复数 <span word="We">We</span>+<span word="are">are</span>+<span word="doing">doing</span> +<span word="sth">sth</span></p><p> 第二人称单复数 <span word="You">You</span>+<span word="are">are</span>+<span word="doing">doing</span> +<span word="sth">sth</span></p><p> 第三人称单数 <span word="He">He</span>（<span word="She">She</span>，<span word="it">it</span>）+<span word="is">is</span>+<span word="doing">doing</span>+<span word="sth">sth</span></p><p> 第三人称复数 <span word="They">They</span>+<span word="are">are</span>+<span word="doing">doing</span> +<span word="sth">sth</span></p><p> 动词变化规则</p><p> <span word="A">A</span>、直接+ <span word="ing">ing</span></p><p> <span word="B">B</span>、去<span word="e">e</span>+<span word="ing">ing</span></p><p> <span word="C">C</span>、重读闭音节，且末尾只有1个辅音字母，双写辅音字母+<span word="ing">ing</span></p><p> <span word="D">D</span>、特殊变化：<span word="die">die</span>-<span word="dying">dying</span>,<span word="lie">lie</span>-<span word="lying">lying</span>，<span word="tie">tie</span>-<span word="tying">tying</span></p><p> <span word="E">E</span>、不规则变化</p><p> 3. 现在进行时的应用</p><p> 在实际运用时，现在进行时常用以下几种情况：</p><p> (1)当句子中有<span word="now">now</span>时，常表示动作正在进行，这时要用现在进行时。如：</p><p> <span word="They">They</span> <span word="are">are</span> <span word="playing">playing</span> <span word="basketball">basketball</span> <span word="now">now</span>.现在他们正在打篮球。</p><p> (2)以<span word="look">look</span>, <span word="listen">listen</span>开头的句子，提示我们动作正进行，这时要用现在进行时。如：</p>
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