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：“我想我也不知道”。