现在进行时练习

I.              按要求改写句子

1.  The boy is playing basketball.

否定句：____________________________

一般疑问句：_________________________

肯定回答：__________________________

否定回答：__________________________

对“is playing basketball”提问：__________________________

对“  The boy”提问：__________________________

2.  They are singing in the classroom.

否定句：____________________________

一般疑问句：_________________________

肯定回答：__________________________

否定回答：__________________________

对“are singing ”提问：__________________________

对“  in the classroom”提问：__________________________