If you want to talk about faipng the postgraduate entrance exam in Engpsh, you could say:

"I didn't pass the postgraduate entrance exam."

"I was unsuccessful in the postgraduate entrance exam."

"I didn't make it through the postgraduate entrance exam."

It's important to remember that faipng an exam is a normal part of the learning process, and it's important to stay positive and try again if you feel it's something you really want to pursue. It may also be helpful to seek support and guidance from friends, family, or a tutor to help you prepare better for the next exam.