从前,在一个句子的城市里,住着四个兄弟。老大叫陈述句,老二叫感叹句,老三叫疑问句,老四叫祈使句。父亲常常告诫他们说:“做事遇到困难,你们四兄弟要齐心协力配合起来才能成功,千万别单独行动。”有一天,父亲让四个儿子把一封信送到西安街一位朋友家去。四兄弟拿着信唱着歌出发 Once upon a time, in a sentence of the city, lived four brothers. The boss called the statement, the second child exclaimed sentence, the third call interrogative sentence, the fourth called the imperative sentence. My father often warned them, “Doing things hard, you four brothers should work together to achieve success, do not act alone.” One day, my father asked four sons to send a letter to a friend's house on Xi'an Street go with. Four brothers holding a singing song departure