Teacher: "John, what is the past participle of the verb to ring?"
John: "What do you think it is, sir?"
Teacher: "I don't think, I KNOW!"
John: "I don't think I know either, sir!"‘

老師:“John,動詞ring的過去分詞是什么?”。
約翰:“你想它是什么呢”?
老師:“我不用想,我知道!”。
約翰:“我想我不知道”。