YOU SAID:

the quick brown fox jumped over the lazy grey dog

INTO JAPANESE

速い茶色のキツネは怠惰な灰色の犬を飛び越えました

BACK INTO ENGLISH

A fast brown fox jumped over a lazy gray dog

INTO JAPANESE

速い茶色のキツネが怠惰な灰色の犬を飛び越えた

BACK INTO ENGLISH

A fast brown fox jumped over a lazy gray dog