translation.en: So for example, if I'm speaking in English, I have to speak grammatically differently if I'm talking about past rain, "It rained yesterday," current rain, "It is raining now," or future rain, "It will rain tomorrow."
translation.zh: 例如，在英语中需要用明确的语法变化来表示不同的时态， 如果我说过去下过雨：“It rained yesterday” 正在下雨：“It is raining now” 将要下雨：It will rain tomorrow.”