Sentence examples for a knock from inspiring English sources

A knock.

A knock is heard.

That's not really a knock.

That's not a knock on Kill.

Then a knock on the office door.

There was a knock at our door.

A knock sounded on the kitchen door.

There's a knock at the door.

Which is not a knock against intricacy.

There was a knock at the door.

There was a knock on the door.