Used to?

 The modal verb “used to” to indicate something that happened or happened in the past on a regular basis. Also, it is used for something that was true before but is no longer true. As with the other modal verbs, "used to" is followed by the base form of the verb (the infinitive without "to").

Affirmative Sentences : Subject + “used to” + verb

He used to smoke a pack of cigarettes a day, but he quit last year.

We used to go to the beach every summer when I was young Negative Sentence: Subject  + “didn’t” + “use to” + verb Food didn’t use to be so expensive We didn’t use to go away on holiday very often when I was young Interrogative Sentences: Did + subject  + “use to” + verbo…? Did you use to live here? Did they use to go to the beach in the summers?