1. They are doing housework .(分別改成一般疑問句和否定句)
疑：Are they doing housework?
否：They aren'tdoing housework.
2．The students are cleaning the classroom . ( 改一般疑問句并作肯定和否定回答)
疑：Are the students cleaning the classroom?
否：The students aren't cleaning the classroom.
3．I’m playing the football in the playground .(對劃線部分進(jìn)行提問)
①劃主語I： Who is playing the football in the playground?
②劃playing the football ：What am I doing in the playground?
③劃the football：What am I playing in theplayground?
④劃in theplayground：Where am I playing the football ?
4．Tom is reading books in his study . (對劃線部分進(jìn)行提問)
①劃Tom：Who is reading books in his study ?
②劃reading books：What is Tom doing in his study ?
③劃books：What is Tom reading in his study ?
我把可以劃的地方都寫出來了,希望可以幫到你.