used to
used to (2) or did use to {v. phr.}
Did formerly; did in the past. — Usually used with an infinitive to tell about something past.
Uncle Henry used to have a beard, but he shaved it off.
Did your father use to work at the bank?
People used to say that tomatoes were poison.
- Sometimes used without the infinitive.
I don't go to that school any more, but I used to.
We don't visit Helen as much as we used to.
I used to go to the movies often. Did you use to?
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Source: A Dictionary of American Idioms
