1. The family rented a former church in downtown Portland and scheduled a concert. By the day of the show, more than 300 people had said they would attend.

2. "Sam, you will come to the party tonight, won't you?"

"Oh, My father wouldn't let me out."

“意愿”和“推测”有时候比较好区分，不过对于这里的两个例子当中的would，我个人感觉似乎理解为“意愿”，或“推测”都有一定道理。

向各位老师请教：那么在这种情况下如何区分would表示的是“意愿”，还是“推测”？或者说区分would的此类用法时，有什么需要注意的事项？如果解释起来比较麻烦，烦请给些相关文章的链接也行，谢谢！