Поставьте глаголы в past continuous write not to do go play read sleep clean have breakfast have lunch walk

Was/Were writing, wasn't/weren't doing, was/were playing, was/were reading, was/were sleeping, was/were cleaning, was/were having breakfast, was/were having lunch, was/were walking.
Выбор was/were зависит от числа. Если единственное, то was. Если множественное, то were.
Например: They were writing.
He was writing.