YOU SAID:

They were really going at while i watched.

INTO JAPANESE

見ながら、彼らは本当にでつもりだった。

BACK INTO ENGLISH

They really look at was going.

INTO JAPANESE

彼らは実際に見ていた。

BACK INTO ENGLISH

They had seen.

INTO JAPANESE

彼らを見ていた。

BACK INTO ENGLISH

They had seen.