No, knock is a noun (a knock on the door) and a verb (to knock on the door).
The secret knock is knock knock, knock knock knock knock
The first occurrence of the multiple repeated knocks appears in Series 1 Episode 10 - The Loobenfeld Decay:Sheldon: (Knock, knock, knock, knock) Leonard, (Knock, knock, knock, knock) Leonard, (Knock, knock, knock, knock) Leonard...Sheldon: (Knock, knock, knock, knock) Penny, (Knock, knock, knock, knock) Penny, (Knock, knock, knock, knock)Penny, (door opens) Good morning.
dr. Knock knock Jonathan Right Knock III
Knock Knock. Who's there? Anniversary. Anniversary who? You forgot?!
Here is a knock, knock fruit joke: Knock Knock: Whose there? Banana Banana who? Knock knock: Whose there? Banana Banana who? Knock knock: Whose there? Banana Banana who? Knock knock: Whose there? Orange Orange who? Orange you glad I didn't say banana.
knock knock knock sock of ock ock ock my clock clock clock is taping for the knock knock knock
Knock knock. Who's there? Banana. Banana who? Knock knock. Who's there? Banana. Banana who? Knock knock. Who's there? Banana. Banana who? Knock knock. Who's there? Orange Orange who? Orange you glad I didn't say banana?
It can be. It depends on how "over" is used. It can be a preposition, an adjective, an adverb, and (in radio communication) an interjection.I am thrilled that my exams are done and over with. (Over is a adjective)Is the game over yet? (Over is an adjective)A thick layer of smoke hung over the city. (Over is a preposition.)Our apartment is cramped and overcrowded. (prefix)Did you knock the candle over? (Over is an adverb.)They came over from Sweden for a conference. (Over is an adverb.)
*Knock Knock "Who's There?" ''Banana'' "Banana Who? *Knock Knock "Who's There?" ''Banana'' "Banana Who? *Knock Knock "Who's There?" ''Banana'' "Banana Who? *Knock Knock "Who's There?" ''Orange'' "Orange Who?" ''Orange you glad I didn't say banana''
knock knock, whose there "FBI OPEN UP" "fbi open up" who? OH WAIT RUNNNNNN
Knock knock. Who's there? "F". "F" who? "F" you.