After doing many research and find more than one result, I would like to know how exactly the R sound is pronounced in American English.
On this video, the woman describes two ways. Firstly, the incorrect one, done by many of her students, in which they curl their tongue backwards:
Then (at 0:57) she describes the correct way, in which the tongue has to raise in the middle, and stays lower at the tip.
But then in this link it says that both ways are right:
I would like to know if americans really only use the one described as "correct" by the woman or if they sometimes mix, or if some americans use the suposedly incorrect version... I even watched another video teaching the "incorrect way" as the right way! (can't post because it limits 2 links... its called "Q&A: How do you pronounce the "R" sound--the American R")
Off: I'm so confused. That woman made me feel really bad for my R, she said it's an OK r sound, but doesn't have the quality of a correct R sound.