Перевести предложения на английский язык и сделать их отрицательными, вопросительными, со специальным словом: Дети вчера собирали пазл.
Мы смотрели телевизор, когда выключили свет.
Лиз поливала вечером цветы.
Когда я пришел домой, мама готовила обед.

Children put together a puzzle yesterday.

We were watching TV when we turned off the lights.

Liz watered the flowers in the evening.

When I got home, my mother was preparing dinner.

Объяснение:

Children made a puzzle yesterday.

Children didn't make a puzzle yesterday.

Did children make a puzzle yesterday?

We were watching TV, when the lights turned off.

We were not watching TV when the lights turned off.

Were we watching TV when the lights turned off?

Liz was watering the flowers in the evening.

Liz wasn't watering the flowers in the evening.

Was Liz watering the flowers in the evening?

When I came home, mum was cooking lunch.

When I came home, mum wasn't cooking lunch.

Was mum cooking lunch when I came home?