YOU SAID:

I have found that my friend's pronunciation is even worse when he listens to the correct sentence first

INTO JAPANESE

私は、彼が最初に正しい文を聞いたとき私の友人の発音がさらに悪いことを発見しました。

BACK INTO ENGLISH

I discovered that my friend's pronunciation was even worse when he first heard the correct statement.

INTO JAPANESE

私は、彼が最初に正しい文を聞いたとき私の友人の発音がさらに悪いことを発見しました。

BACK INTO ENGLISH

I discovered that my friend's pronunciation was even worse when he first heard the correct statement.