Напишите следующие предложения в вопросительной и отрицательной формах: образец: they were playing all day. were they playing all day? they weren’t playing all day. it was snowing all day yesterday. they were doing their homework when i came to see them. they were cleaning this flat all morning. she burnt her hand when she was cooking dinner.

It was snowing all day yesterday.     was itsnowing all day yesterday?  
it was not snowing all day?
They were doing their homework when I came to see them. Were they doing their homework when I came to see them?    They weren’t doing their homework when I came to see them.
They were cleaning this flat all morning. Were they cleaning this flat all morning?
They weren’t cleaning this flat all morning.
She burnt her hand when she was cooking dinner. When was she burnt her hand?
She burnt her hand when she weren’t cooking dinner.