になっていただろう

would have become

→ に

phrase Rare #38,055

would have become Used for a hypothetical or counterfactual result in the past, often after a conditional phrase such as 〜たら or 〜なければ. Depending on context, it can also mean “would have been.”

JA: 雨が降らなかったら、試合は中止になっていただろう。

EN: If it hadn't rained, the game would have been canceled.

もっとよい時代に生まれていたら、彼は有名になっていただろう。

If he had been born in a better era, he would have become famous.

君のレインコートがなければ、私はずぶぬれになっていただろう。

If it weren’t for your raincoat, I would have been soaked to the skin.

君のレインコートがなかったら私はずぶぬれになっていただろう。

Without your raincoat, I would have been soaked to the skin.