Excuse me, I know that my question is probably duplicate in this forum, but as a beginner of English language, that's important for me to know the difference(s) between these words. I'm sorry if my question make you disappointed or angry.
Is there any difference between did and used to, considering these two dialogues?
- Did you use to teach art?
- No, I didn't teach art. I taught history.
- Did you use to have a dog?
- No, we didn't. What about you? Did you have a dog?
It seems to me that did and used to are basically two ways to express the same meaning and there is not any main differences between them. Am I right?