先看例子：盼！盼！———在张村公社医院的大门口，社员们、医护人员们正焦急的盼望着……汽车开来了！———好！马上拿下药箱！马上注射！注射剂十分灵效，立竿见影，病人立刻止住了疼痛，恢复了神智……（《为了六十一个阶级弟兄》）不难看出，例子中的画线部分都是无主句 Let’s look at an example: hope! Hope! --- At the gate of the Zhangcun Community Hospital, members and medical staff are anxiously looking forward to ... the car is coming! ---it is good! Take the medicine box right away! Injection immediately! The injection was very efficacious and immediate, and the patient immediately stopped the pain and restored the sanity... (“Forty-one class brethren”) It is not difficult to see that the lines drawn in the example are without subject sentences.