Birthday can be a really hard word  for my students, let's break it down.  

生日對我的學生來說可能是一個非常難的詞，讓我們把它分解一下。

B consonant, that's pretty easy but the  /ɜɹ/ vowel, that can be tricky. Bir,  

B輔音，這很容易，但/ɜɹ/元音，這可能很棘手。伯爾。

just make the r sound. Don't  try to make a vowel. B-ir, Bir, 

只需發出r的聲音。不要試圖發出元音。B-ir, Bir,

Brrrr! Bir,  

Brrrr!伯爾。

birth. And we have the unvoiced th,  

生。而我們有未發聲的th。

your tongue tip has to peek just through but don't  hold it, don't clench. Let the air flow freely. 

你的舌尖必須剛好探出，但不要握住它，不要緊握。讓空氣自由流動。

th-, birth, birth. Birthday. 

th-, birth, birth.生日。

And day is not the problem  part of that word. Birth-day. 

而日並不是這個詞的問題所在。出生日。

Birthday.

生日。

Happy Birthday.

生日快樂。