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.
最后一句，would要怎么解释比较好?
我记得would是用来描述在过去中，未来会发生的事，放在这句要怎么解释会比较好?

Yesterday

昨天不认为，今天很确信

那为什么不用didn't就好了，要用would not have? 差在哪

Would 带有一点事后回顾的意味，通常是在说过去的事才会用would, could 也是同样道理。