1.Is Mr.Brown listening to music now? Hay Mr.Brown is listening to music now?
=> Câu gạch chân là đúng vì theo cấu trúc : Am/is/are + S + V-ing ? Yes , S + am/is/are , No , S + am/is/are not
She did play badminton yesterday? Hay did she play badminton yesterday?
=> Câu gạch chân là đúng vì theo cấu trúc : Did + S + V( nguyên thể ) + time ? Yes , S + did , No , S + didn't