YOU SAID:

he had had had had had had had the professor's approval

INTO JAPANESE

彼は教授の承認を得ていた

BACK INTO ENGLISH

He had the approval of the professor.

INTO JAPANESE

彼は教授の承認を得た。

BACK INTO ENGLISH

He got the approval of the professor.

INTO JAPANESE

彼は教授の承認を得た。

BACK INTO ENGLISH

He got the approval of the professor.