「without the knowledge of~(~に知られずに)」
He married without the knowledge of his parents.
「彼は両親に知らせずに無断で結婚した。」
・ofは主格関係を示す。 before his parents knew itということ。
He married without the knowledge of his parents.
「彼は両親に知らせずに無断で結婚した。」
・ofは主格関係を示す。 before his parents knew itということ。