Как образует вопросы и отрицательные предложения конструкция "used to do something"? Приведи пример

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1 марта, 04:20

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Валентиана · Answer 1

I used to do exercise in the morning.

I didn't use to do exercise in the morning.

Did he use to do exercise in the morning?

Арм · Answer 2

Did he use to smoke when he was young?

He did not use to smoke when he was young.