YOU SAID:
The rat killed many cats when they took over the world.
INTO JAPANESE
ねずみは、世界を乗っ取ったとき、多くの猫を殺しました。
BACK INTO ENGLISH
A mouse killed many cats when it took over the world.
INTO JAPANESE
ねずみが世界を乗っ取ったとき、多くの猫が殺されました。
BACK INTO ENGLISH
When mice took over the world, many cats were killed.
INTO JAPANESE
ねずみが世界を支配したとき、多くの猫が殺されました。
BACK INTO ENGLISH
When mice ruled the world, many cats were killed.
INTO JAPANESE
ねずみが世界を支配していたとき、多くの猫が殺されました。
BACK INTO ENGLISH
When mice ruled the world, many cats were killed.
That didn't even make that much sense in English.