may you say a again 你能重讲一次 这样说吗

我觉得may you say it again 比较好．
it在这里做say的宾语．这样句子就完整了

may you say it again
I beg your pardon?
sorry?
excuse me?
pardon me?
说法很多啦！！！

对的，不过不要加a
May you say it again?
或May you say that again?

我觉得最地道的是I beg your pardon?
或者完整的说can you say it again?
would you mind repeating what you said?

没有说may you的.另外say后最好加宾语,如it.可以这样说:
Could you say it again?
或
I beg your pardon.
或
Pardon me?

May you say again?去掉a

一般不用I beg your pardon.直接用pardon？就可以了

或者Once again?也可以