"下雨"的英语表达为"It's raining."，读音为 /ˈrānɪŋ/。
这个短语来源于英语中动词"rain"的第三人称单数形式"rains"，加上了不可数名词"it"，形成了现在进行时的句型。
例句：
"It's raining cats and dogs." (下着倾盆大雨)
"I don't want to go out, it's raining." (我不想出去，下雨了)
"The forecast says it's going to rain all day." (天气预报说整天都要下雨)