"Used to" vs. "use to" causes a lot of confusion, even for native English speakers, because they generally sound alike when spoken.
I started writing out an explanation, but it's late and I'm groggy from a cold. So thank Google for this link I found on "used to" vs. "use to."
I hope this explains this better than I can right now:
That is because "use to" is a mistaken understanding of "used to" because "used to" sounds like "use to."
You know, I think you're right. I always say it like "used" but grammatically, duh, I should be writing "use".
As a UK native speaker, I have found that a safe way to negate "I used to know" is:
"I used not to know".
Passions run high on this, depending on the speaker's (and listerner's) background. Almost any other way of negating will upset someone but this seems not to offend. (You see what I did there? :-) :-))
Duolingo also accepts it.
because it is not correct english grammar. You'd say I didnt know, or I used to know, but didnt know and used to know are not always grammatically interchangeable.
When you use "DID" in front of another verb, present tense should be used for the 2nd verb. Correct way: "did not use"
I'm just going on the record to state this is an awful sentence, and the imperfect of saber is almost never used in English when the statement reflects a negative.
Saying "yo sabía" or "I used to know" is acceptable in English when talking about something you knew at some point in time and cannot recall at the moment. But, while "I used to not know" might be true, it is clunky English and is much better said as "I didn't know."
What's the difference in meaning between "No supe" and "No sabía." I know that one is preterit and the other imperfect, but I'm trying to understand the nuances of usage. Thank you!
"I used to not know" wasn't accepted. Apparently it wanted "I used not to know"
I didn't know was marked wrong. But then I often get marked wrong and then the correct version shown matches exactly what I have put. ???
If sabía = used to know, used to taste, or knew - then how it is the answer "I did not know" and not "I didn't use to know". I've read a few discussions below but I'm still not clear on the discrepancy. URLs are pretty fine so long as it provides a clear explanation. Gracias!
This could be "yo no supe" just as easy these ambiguous english sentences are killing me
Same exact exercise, twice with the masculine voice, twice with the feminine. What's up with that?