YOU SAID:

When a fly flies behind another fly, then a fly flies behind a fly. But when a fly flies behind more than one fly, then flies fly behind flies.

INTO JAPANESE

ハエが別のハエの後ろを飛ぶとき、ハエはハエの後ろを飛ぶ。しかし、ハエが複数のハエの後ろを飛ぶ場合、ハエはハエの後ろを飛ぶ。

BACK INTO ENGLISH

When a fly flies behind another fly, the fly flies behind the fly. However, if a fly flies behind multiple flies, the fly will fly behind the flies.

INTO JAPANESE

ハエが別のハエの後ろを飛ぶとき、ハエはハエの後ろを飛ぶ。ただし、ハエが複数のハエの後ろを飛ぶ場合、ハエはハエの後ろを飛ぶでしょう。

BACK INTO ENGLISH

When a fly flies behind another fly, the fly flies behind the fly. However, if a fly flies behind multiple flies, the fly will fly behind the flies.