Mouth shape:
before vowel:
. make your mouth become circle
. roll up your tongue
. let air go through two side of your tongue
. vibrate your vocal cord
. release your tongue
after vowel:
. roll up slightly
Detail:
. like a idio whispering and baby crying (嗚嗚)
Example
. read
.
Tr:
Mouth Shape:
1. start from T
2. 'r' shape