The past tense of "will" is "would." "Would" is used to talk about what people wanted to do or were willing to do in the past, and also to describe past beliefs about the future. For example, if someone in the past believed something would happen, "would" is used to express that. "Would" can also be used to make polite requests or talk about hypothetical situations. Unlike "will," which expresses future intent or determination, "would" refers to past or conditional contexts related to "will".
