Did you go to the park yesterday? Yes,I did.No,I didn't.
Are they listening to music?Yes,they are.No,they aren't.
望采纳哦
I didn't go to the park yesterday.(否） Did you go to the park yesterday? Yes,I did. No,I didn't.
They aren't listening to music.(否） Are they listening to music? Yes,they are. No, they aren't.(望采纳，谢谢）
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