1：we used to play games on the playground .（改成否定句） we __ __ __ play games on the playground2：the little boy is interested in reading comics.（改为否定句）the little boy __ __ __ reading comics.3：my sister often lietens to music in her room.（改为过去常常…）_____________________________________________________

1.we are do not used to play games on the playground.
2.the little boy is do not reading comics.
3.listen my sister often listened to music in her room

1 we don,t to play games on the playround.

1：we used to play games on the playground .（改成否定句） we didn't use to play games on the playground
2：the little boy is interested in reading comics.（改为否定句）
the little boy isn't interested inreading comics.
3：my sister often lietens to music in her room.（改为过去常常…）
是listen my sister often listened to music in her room