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二、现在进行时常有三种句型：
特殊疑问句：疑问词＋be＋主语＋v-ing＋其它？如： —What is she doing now？她在干什么？She is singing.
句型3：
疑问式：主要分一般疑问句和特殊疑问句两种句式。
一般疑问句：Be＋主语＋v-ing＋其它？如： —Is he running？他在跑步吗？ —Yes，he is．（No，he isn't．）
What is Jack doing?
He is riding his bicycle.
Is Xiaoming reading his book?
No, he isn’t. He is sleeping.
They are dancing.
What are they doing?
She is spinning.
What is Xiaohong doing?
He is eating watermelon.
Bajie is not working.