🍏 The sentences are similar but they do have their differences. In both cases your physical location is close to the door. However, when you say, “I'm standing at the door” it makes me think that you are about to go through the door or attempt to enter the building. When you say, “I'm standing by the door,” you could just be passing time there, hanging out with your friends in that location, or perhaps planning to enter at a different time. When you say, “I'm standing by the door,” there is a lack of communicated intent to enter the dwelling, building, or location. If you say, “I'm standing next to the door” it is almost the same thing as saying, “I'm standing by the door”. Using “next to” and “by” draws focus to your physical closeness to the door. It is unclear whether or not you are planning to go through the door. I hope this helps. Have a great day! 😊👍🍎

I would say that Standing by the door has a slight idea of anticipation, of waiting and it is more general. I am standing by the door, waiting for my friend to arrive. You can also say that you are waiting 'by' that phone - i.e. waiting for it to ring - but it might be in your pocket. (It goes back to the time when phones were fixed to a wall, but the concept is the same) Standing next to the door literally means that you are physically standing next to the door, - between the potplant and the door and behind the doormat. It has to do with a more exact location

I'm standing by the door.

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