现在进行时的用法以及动词ing的变化规则.doc

现在进行时的用法以及动词ing的变化规则1现在进行时表示现在正在进行或发生的动作，也可表示当前一段时间内的活动或现阶段正在进行的动作。（句中一般含有now, look, listen.）2现在进行时的肯定句基本结构为be+动词ing.如：Tom is reading books in his study .3现在进行时的否定句在be后加not。如：Tom is reading books in his study .Tom is not reading books in his study .4现在进行时的一般疑问句把be动词调到句首。  如：Tom is reading books in his study .Is Tom reading books in his study ？5现在进行时的特殊疑问的基本结构为：疑问词+一般疑问句?  （注意：当划线部分包含谓语动词时，用疑问词代替划线部分放到句首，原划线处应加上doing）  如：Tom is reading books in his study .      Tom is reading books in his study .Is Tom reading books in his study ?      Is Tom reading books in his study ?What is Tom doing in his study?        Where is Tom reading books?动词加ing的变化规则1一般情况下，直接加ing，如：cook-cooking2以不发音的e结尾，去e加ing，如：make-making, taste-tasting3如果末尾是辅音字母加一个元音字母和一个辅音字母，双写末尾的辅音字母，再加ing，如：run-running, stop-stopping