it never rains but it pours 福无双至，祸不单行

“福无双至，祸不单行”是一个汉语成语，指“幸运的事不会连续到来，祸事却会接踵而至（literally blessings never come in pairs and misfortunes never come singly）”，与俗语“屋漏偏逢连夜雨”意思相同，可以用“it never rains but it pours”表示。“福无双至”和“祸不单行”也可分开使用。

例句：

这真是有意思的一年——丹尼失业了，我病休了三个月，乔希摔断了腿。俗话说的，真是福无双至，祸不单行。

It was an interesting year - Danny lost his job, I was off sick for three months and Josh broke his leg. It never rains but it pours, as they say!

屋漏偏逢连夜雨，先是我的车被偷了，然后我又丢了办公室的钥匙。

It never rains but it pours! First I found that the car had been stolen and then I lost the keys to my office.