YOU SAID:
"We must do this again sometime,"
INTO JAPANESE
「いつかまたこれをやらなきゃ」
BACK INTO ENGLISH
"I'll have to do this again sometime."
INTO JAPANESE
「またいつかこれをやらなきゃね。」
BACK INTO ENGLISH
"I'll have to do this again sometime."
You've done this before, haven't you.