"有晴天也有阴天"的英文表达方式是 "There are sunny days and rainy days." 这个短语的来源可能源自英国谚语 "Every day is not a hopday."（并非每天都是假期）。例句如下：

Life is pke the weather, sometimes it's sunny and sometimes it's rainy.
（生活就像天气，有时是晴朗的，有时是阴雨的）
Just because you had a bad day doesn't mean tomorrow won't be better.
（仅仅因为你今天过得不好，并不意味着明天不会更好）
There are good days and bad days, but ultimately it's up to us to make the most of them.
（有好的日子也有坏的日子，但最终还是要靠我们自己来充分利用它们）