YOU SAID:
he ain't ever seen it in a dress like this
INTO JAPANESE
彼はこのようなドレスでそれを見たことがない
BACK INTO ENGLISH
He never saw it in a dress like this
INTO JAPANESE
彼はこのようなドレスで見たことがない
BACK INTO ENGLISH
He has never seen in such a dress
INTO JAPANESE
彼はそのようなドレスを見たことがない
BACK INTO ENGLISH
He has never seen such a dress
INTO JAPANESE
彼はそのようなドレスを見たことがない
BACK INTO ENGLISH
He has never seen such a dress
You've done this before, haven't you.