思(おも)い違(ちが)いをするto misunderstand

思(おも)い違(ちが)いをすることは誰(だれ)にもあることです。

Misunderstanding is something that can happen to anyone. {to misunderstand}

自分(じぶん)が正(ただ)しいと思(おも)い違(ちが)いをしている彼(かれ)は滑稽(こっけい)だ。

He is ridiculous, misunderstanding that he is correct. {to misunderstand}

もう休日(きゅうじつ)だと思(おも)い違(ちが)いをしていたが、本当(ほんとう)は平日(へいじつ)だった。

I misunderstood thinking it was already a holiday, but it was actually a weekday. {to misunderstand}

あなたはそれについて思(おも)い違(ちが)いをしているようです。真実(しんじつ)はこれです。

It seems you are misunderstanding about that. The truth is this. {to misunderstand}

僕(ぼく)は思(おも)い違(ちが)いをしていたが、両親(りょうしん)は不仲(ふなか)ではなく本当(ほんとう)は仲良(なかよ)しだったようだ。

I had misunderstood, but it seems that my parents were not on bad terms, they were actually quite close. {to misunderstand}