As reported by the NOAD in a note about the usage of used: There is sometimes confusion over whether to use the form used to or use to, which has arisen largely because the pronunciation is the same in both cases. Except in negatives and questions, the correct form is used to: we used to go to the movies all the time (not we use to go to the movies). However, in negatives and questions using ...
"I use to", or "I used to" - English Language & Usage Stack Exchange
Here is a question that has been nagging me for a few years: Which is the right usage: "Didn't used to" or "didn't use to?" Examples: We lived on the coast for years but we didn't use to go to the
differences - Didn't used to or didn't use to? - English Language ...
I am trying to find out if this question is correct. Did Wang Bo used to be awkward? Should I write "use to be" instead of "used to be," or is "used to be" correct in this sentence?
Certain websites devoted to idioms claim that they (idioms) are not used in formal conversations or writing; that is, they claim that these devices are always used in only informal situations. As the
Are idioms used in formal contexts? - English Language & Usage Stack ...
When is "some" used as plural and when is it used as singular?
There's so many people in here! There's so much people here! Which one should be used, and why?
I have used cocaine. I took cocaine at least once sometime in the past. I was using cocaine. In the past, I was a habitual user of cocaine. EDIT: As the comment says, this can also mean a process in the past, e.g. "I was using cocaine when the accident happened" can mean "I was not looking at the road since I was snorting cocaine." I have been using cocaine. Starting some time in the past, and ...