Location particles and an uncertain report
A class compares the original examples 「図書館で勉強します」, 「図書館に本があります」 and 「明日は雨が降るかもしれません」. One learner translates both particles simply as at and then claims they can always be exchanged. Another treats the final sentence as a confirmed weather forecast. A third analyses an activity location, an existence location and a statement of possibility separately. The task asks for explanation of the complete constructions and their evidential limits. No actual library, weather report or recording is supplied. These are original classroom sentences, not official test questions. A good response should connect the particles and ending to meaning rather than infer universal rules from one English word or assume that recognizing 雨 proves certainty about tomorrow.
1. Explain the first two examples.
Read the worked answer
で locates the studying activity in the first sentence. に locates the existence of books in the second. Their functions follow these constructions, not a universal interchangeable equivalent of English at.
2. How certain is the rain statement?
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かもしれません expresses possibility. The sentence does not establish that rain is confirmed, that the source checked a forecast or that every similar ending expresses the same evidential strength.