A: The general counsel for Fletcher Engines knew every move I was gonna make
before I even made it.
B: How could he..
A: Because Hardman must have tipped him off
B: You really think he would do that?
A: I wouldn't have yesterday, but I sure as hell do today.
最後一句，would要怎麼解釋比較好?
我記得would是用來描述在過去中，未來會發生的事，放在這句要怎麼解釋會比較好?

Yesterday

昨天不認為，今天很確信

那為什麼不用didn't就好了，要用would not have? 差在哪

Would 帶有一點事後回顧的意味，通常是在說過去的事才會用would, could 也是同樣道理。