when pigs fly片语

片语

1. 1

   绝不可能、永无可能、除非太阳从西边出来口语

   He'll clean his room when pigs fly.

   他会整理房间？除非太阳从西边出来。

2. 2

   做梦、休想口语

   They'll pay us back when pigs fly, I'm afraid.

   恐怕他们要还我们钱是做梦了。