Упражнение 397 на Past Continuous

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Образование Past Continuous — справка

Утверждение и отрицание в Past Continuous
I he she it	was was not (wasn't)	doing working studying playing dancing
we you they	were were not (weren't)	doing working studying playing dancing

Вопрос в Past Continuous
What Why Where How ...	was	I he she it	doing? working? studying? playing? dancing?
What Why Where How ...	were	we you they	doing? working? studying? playing? dancing?