I don't think i know 我不知道啊
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”。