Question

use knock as a noun and as a verb ​

Answer 1

Answer:

The old man knocked (verb) the door , but the knock(noun) was not heard by anyone.

Answer 2

Answer:

As verb- Please; knock the door.

As noun-

•He knocked three times and waited.

•knock at/on something I knocked on the door and went straight in.

•Somebody was knocking on the window.

Explanation:

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