he tapped in his old way on the door
The word "knocked" can serve as both a verb (e.g. "She knocked on the door") and a past participle (e.g. "The door was knocked down").
He left a mark on it he knocked so hard, it was this mark that told the dwarfs which door to go to.
Rhoda.
The active voice sentence "Who is knocking at the door?" can be changed to passive voice as "By whom is the door being knocked?" In the passive voice sentence, the subject of the active voice sentence ("who") becomes the object of the preposition "by," and the verb "knocking" is changed to "being knocked," with the helping verb "is" moved to the appropriate position.
On the left behind the staircase.
He knocked on the door, then walked in without waiting for a response.I opened the door.
at the end of the palace of shadow.
Although it's not seen at the beginning, later it's discovered that Lewis himself knocked on the door, and his mother just left without doing it.
It can actually be used as both.Noun - For example: "I heard a knock at my door"Verb - To knock. For example: "I knocked on the door"
Under carpet of 5th step of staircase outside door
knock can be a noun - he suffered a knock and can also be a verb - you knock on my door