I don't think I know
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!"‘ 老师：“John，动词ring的过去分词是什么?”。 约翰：“你想它是什么呢”? 老师：“我不用想，我知道!”。 约翰：“我想我不知道”。