In English, in order to form a valid sentence, there needs to be at least one noun. While you can say “what’s the weather?” “raining,” as a reply, if there’s no implied subject, an empty noun must be established first. English would use “it” as a pure empty noun for the sake of the sentence.
In English, in order to form a valid sentence, there needs to be at least one noun. While you can say “what’s the weather?” “raining,” as a reply, if there’s no implied subject, an empty noun must be established first. English would use “it” as a pure empty noun for the sake of the sentence.