I passed the test. I ______ it without your help.
would not pass
wouldn't have passed
didn't pass
had not passed
would+have+done虚拟语气，表示对过去事情的假设，是与过去事实相反的情况。意思是“本来会做某事，因为某种原因而没有做”。wouldn't+have+done表示“本来不会做某事，因为某种原因却做了”。