I forward this plaintive cry from Japan. I don't understand English R either. All of my Rs are consonantal.

 

--start forward--

 

I have difficulty understanding?@an English pronunciation [r].

 

The book says,

 

The r of English in the United States is made either by curling the tongue tip back into the mouth or by bunching the tongue upward and back in the mouth.

 

I can understand the first half but not the second description.
Would you explain to me with easier terms so that I can understand it.

 

--end forward--

 

Mark.