was killing, had killed, would have killed
ここの誰かを殺してたかも…
I might have killed someone here…
— マルコムＸ (1992)
本気だったら殺してたよ
If I were serious, I would’ve killed you.
— パラサイト 半地下の家族 (2019)
人を…殺してたんですか？
Were you… killing people?
— 万引き家族 (2018)
殺してたかもしれないじゃん
You could’ve killed them, you know.
— 天気の子 (2019)