YOU SAID:

If flies fly after flies, flies are flying after flies

INTO JAPANESE

ハエがハエの後に飛ぶ場合、ハエはハエの後に飛んでいる

BACK INTO ENGLISH

If a fly flies after a fly, the fly is flying after the fly

INTO JAPANESE

ハエがハエの後に飛ぶ場合、ハエはハエの後に飛んでいる

BACK INTO ENGLISH

If a fly flies after a fly, the fly is flying after the fly