小美风说发这个音时嘴型要圆。与我以往的理解不同,于是我查看The American Accent Guide这本书,里面有段话。
Lip Posture:The lips are not involved in producing the/r/ sound, but they are rounded when the neighboring vowels require lip rounding, as in: or, rude, round.
我的理解是,除非旁边的元音需要圆嘴的话,否则发r音时嘴唇就是一打酱油的,而pray的ei音不需要圆嘴,redio也是一样道理。
探讨一下。