used to go, didn't use to go or Did...use to go?
We use it to talk about habits or states in the past.
Montreal used to be very polluted, but it is cleaner now.
My uncle used to smoke eighty cigarettes a day. He died at forty-five.
I never used to like coffee, but now I drink a lot of it.
We didn't use to watch TV when it was hot.
Did you use to go swimming when you lived in Victoria?
NOTICE: We can also use would for past habit:
Henry VIII of England would often become angry if anyone disagreed with him.
I am used to working hard. It is not new to me.
I am getting used to the cold weather, but it was difficult for me at first.
Don't worry about the new job. You'll soon get used to it.
He was not used to living on his own, so when he started, it felt very strange.
NOTICE: See the difference in meaning:
He is used to getting up early.
He has got up early for a long time.
He used to get up early.
But now he gets up late.