YOU SAID:

my ability to write eloquently seems to decline over the past few centuries

INTO JAPANESE

雄弁に書く能力は過去数世紀にわたって低下しているようです

BACK INTO ENGLISH

The ability to write eloquently seems to have declined over the last few centuries

INTO JAPANESE

雄弁に書く能力は過去数世紀にわたって低下したようです

BACK INTO ENGLISH

The ability to write eloquently seems to have declined over the last few centuries