use to
fixed phrase.you use this to talk about something that happened often in the past but does not happen now.
fixed phrase.a semi-modal construction used to express habitual actions or states in the past that have since ceased. It functions as a marginal modal or a lexical auxiliary depending on the syntactic analysis.
“I used to play football every Saturday when I was younger.”
“She used to live in London, but she moved to a small village last year for a quieter life.”
“The building used to serve as a local library before it was repurposed into a modern community hub for digital arts.”
always followed by the base form of a verb.
contrast with 'be used to' (familiarity) and 'get used to' (process of becoming familiar); emphasize that 'used to' has no present tense form.
in negative sentences and questions with 'did', the 'd' is dropped because 'did' already indicates the past tense.