但是昨天我發true,rue,roof給native speaker聽,說不太對頭。但是我發raise他說就對。所以我還在琢磨這個問題,現在的想法是,R之所以被稱為美音裏最難的一個音(Rachel/俺廚師都有說),可能與它在不同的position發音不同有關。
1. initial position as a consonant as in raise, rose.
2. after vowel, as a rhotic feature as in hair, car
3. part of consonant cluster as in true, drew, great, strong, etc.
Looking forward to your post, 永學哥。