YOU SAID:

When two witches were watching tho watches which Witch would watch which watch

INTO JAPANESE

2人の魔女がどちらの魔女がどれを見ているか見ていた時

BACK INTO ENGLISH

When two witches were looking at which witch was watching which one.

INTO JAPANESE

2人の魔女がどちらの魔女を見ているかを見ていた時

BACK INTO ENGLISH

When I was watching which witch the two witches were looking at,

INTO JAPANESE

二人の魔女がどちらを見ているのか見ていたら

BACK INTO ENGLISH

If you were to see which of the two witches was watching,

INTO JAPANESE

二人の魔女のどちらが見ているのか見てみると

BACK INTO ENGLISH

I saw which of the two witches was watching.

INTO JAPANESE

二人の魔女のどちらが見ているのか見た。

BACK INTO ENGLISH

I saw which of the two witches was watching.