Fill in the Blanks Used tto and Did use toOnline version 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) by leidy zapata 1 use to to to Did didn't to use used never used to used go play 1 . I drink coffee every morning but now I drink tea . 2 . I swimming every morning . 3 . I soccer on Saturday . 4 . I smoke . 5 . you run to school when you were a child ?