I didn't use to have a lot of friend in college.
Right
I didn't usually go to Santos on vacation.
Wrong
My brother don't use to eat vegetables.
Wrong
I used to teach English when I was living abroad.
Right
I usually meet my friends on the weekends.
Right
I never use to like soccer, but I watch it every week now.
Wrong
I didn't use to like hiking. However, now I do it every month.
Right