YOU SAID:

I just had an idea and then I forgot it right away

INTO JAPANESE

私はちょうどアイデアを持っていたし、私はすぐにそれを忘れてしまった

BACK INTO ENGLISH

I just had an idea and I quickly forgot about it

INTO JAPANESE

私はちょうどアイデアを持っていたし、私はすぐにそれについて忘れてしまった

BACK INTO ENGLISH

I just had an idea and I quickly forgot about it