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?