1.They’re listening to pop music now.
答案:They aren’t listening to pop music now.
2.Many people can speak English nowadays.
答案:Many people can’t speak English nowadays.
3.You must make your bed after you get up every day.
答案:You don’t have to/needn’t make your bed after you get up every day.
4.His mother has a beautiful car.
答案:His mother doesn’t have a beautiful car.
5.We need a pen and a piece of paper.
答案:We don’t need a pen and a piece of paper.
6.I need wear a warm coat.
答案:I needn’t wear a warm coat.