であるかのように

as if

→ だ
phrase Rare #32,376
as if Used to describe something as though it were true. である is a formal form of だ, and かのように means “as if” or “as though.”
JA: 彼は何も知らないであるかのように振る舞った。
EN: He acted as if he knew nothing.

妻はまるで私が町一番のお金持ちであるかのようにお金を使う

My wife spends money as if I were the richest man in town.

彼は僕をうそつきであるかのように言った

He spoke of me as if I were a liar.

その外国人はまるで母国語であるかのように日本語を話す

That foreigner speaks Japanese as if it were their native language.