YOU SAID:

I didn't know you were gonna bring a diary.

INTO JAPANESE

あなたが日記を持ってくるとは知りませんでした。

BACK INTO ENGLISH

I didn't know you would bring a diary.

INTO JAPANESE

あなたが日記を持ってくるとは知りませんでした。

BACK INTO ENGLISH

I didn't know you would bring a diary.