1. He is knocking on the door.
2. He is knocking at the door.
3. He is knocking (on the door) at the door.
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Which one is right? Are both okay? Do both have a different meaning?
Doe #2 mean #3?
2. He is knocking at the door.
3. He is knocking (on the door) at the door.
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Which one is right? Are both okay? Do both have a different meaning?
Doe #2 mean #3?