used to do

used to

1. Used before an uninflected verb to indicate an action or state that was done or existed formerly or previously. (The verb is sometimes dropped if referenced earlier.) I used to be a high school principal, before I changed careers. A: "Do you have guitar I could borrow?" B: "I used to, but I sold it last year."
2. Familiar with or habituated to someone or something. Is she getting used to her new job? I know Gregory can be a bit pretentious at times, but you get used to him after a while. I never could get used to driving on the other side of the road when I lived in England.
See also: used
Farlex Dictionary of Idioms.

used to do something

to have done something [customarily] in the past. We used to go swimming in the lake before it became polluted. I used to eat nuts, but then I became allergic to them.
See also: used
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • as one does
  • by half
  • 10-4
  • come in
  • come in a certain position
  • come on in
  • be (flat) on (one's) back
  • (Is) that everything?
  • a little goes a long way
  • Fanny's your aunt