现在进行时：三、句型转换：1.They are doing housework .(分别改成一般疑问句和否定句) ①
现在进行时：三、句型转换：
1.They are doing housework .(分别改成一般疑问句和否定句)
①_______________________________________________
②_______________________________________________
2．The students are cleaning the classroom .( 改一般疑问句并作肯定和否定回答)
①_______________________________________________
②_ ___________________________________
③_____________________________
1.They are doing housework .(分别改成一般疑问句和否定句)
①_______________________________________________
②_______________________________________________
2．The students are cleaning the classroom .( 改一般疑问句并作肯定和否定回答)
①_______________________________________________
②_ ___________________________________
③_____________________________
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