3b^2/10×15/b^3Помогите пожалуйста ​

Past Progressive.

Помогите пожалуйста,поставить предложения в отрицательную и вопросительную формы.

1)  My cousin was reading a newspaper at 9 o`clock in the evening.

2) She was having a break at the moment.

3) We were on the phone when we heard the news.

4) Her sister was sleeping all day long.

5) They were watching Men in Biack at 2 o`clock.