YOU SAID:

Little did he know he made a grave mistake boom noises intensefies

INTO JAPANESE

彼は彼が重大な間違いブームの騒音を激しくしたことをほとんど知らなかった

BACK INTO ENGLISH

Little did he know that he had intensified the noise of the serious mistake boom.

INTO JAPANESE

彼は自分が重大なミスブームの騒音を強めたことはほとんど知らなかった。

BACK INTO ENGLISH

Little did he know that he had intensified the noise of a serious miss boom.

INTO JAPANESE

彼は深刻なミスブームの騒音を強めたことはほとんど知りませんでした。

BACK INTO ENGLISH

Little did he know that he had intensified the noise of a serious miss boom.