Question

-Is that ture?-Yeah,I____it possible,if I hadn't seen it happen.A.didn't believe

B,wouldn't have believed C.hadn't believed D.won't believe

Answer 1

“俊狼猎英”团队为您解答：
B,wouldn't have believed 为正确选项
这是由if引导的虚拟语气的句子，表示与过去事实相符的假设，从句用过去完成时，主句要用would have +过去分词。

祝你进步

追问

为什么要用Would的呢？

追答

这是虚拟语气要求的，表示对过去的假设，所说的不是真的，所以要用would，不能用will

Answer 2

B,wouldn't have believed
虚拟语气（完成时）

Answer 3

A