From: Massachusetts USA Registered: 2011-08-01 Posts: 530
It's similar with Japanese people with R and L, and frankly I never know how to pronounce them in Japanese...
It's nothing like an "r". You make an "r" sound using your teeth and lips. The sound you want to make is actually between an "l" and a "d".
That depends on your R... it -is- similar to the latin R (the tip-of-the-tongue trillable R); it's nothing like the german R where the tip of the tongue is down and out of the way and the sound is made 'in the throat' as we say (but technically with the shape of the mouth, as you say). I find that in my English I use both of these R's - depending on the word.
(Actually if you look at the kind of detail the international phonetic alphabet goes into, I probably could be said to use half a dozen or more R's, but I'm not going to try to work them out. )
I actually learned english by myself, without ever opening a grammar book. Im from Brazil, and ever since I was little I watched tv series and movies in english, so I developed the feeling Khatz talks about in his method. I just know when it feels wrong, even when I dont know why it feels wrong. So I think its possible.