Used to Version en ligne A common mistake both for learners of English as well as native speakers is the difference between “Used to” and “Use to” and when (or if) we put the letter D at the end of the verb. First let’s look at the meaning of it: Used to = an action or habit that was common in the PAST but not anymore. This should not be confused with To be used to = accustomed to something (normally out of habit or experience) par leidy zapata 1 Negative 2 Affirmative I didn't use to smoke cigars I didn't use to go to the partys all the nights I did not use lies to go to parties I used to play with my cars. I used to laugh a lot I used to cry all the day.