同学你好，该知识点来自沪江网校《英语零基础直达大学四级【周年庆特惠班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学好：
助助帮你改一下，供参考：
Recently, a piece of interesting news came from Zhongshan Park.【留意大小写格式；happen 通常不用news 做主语】
One Sunday  morning, there was a woman selling ice cream in the park. 【原句谓语逻辑有误，is 后面不能再写is selling】
Suddenly, a young man came to buy an ice cream.【避免使用过多的同样的句型；这里可以虚构一个具体的人物，用customer 不太好；谓语用came 更符合语境】
At that moment, he was seen to steal the woman’s wallet by an old man, who was sitting on a bench nearby in the park. 【描述过去的事情，用at that moment更准确；第一次提到old man，用an；定语从句处理为过去进行时更好；“在椅子上”用on】
But the woman didn’t know this. When the young man was walking past the old man, he was knocked over by an umbrella. The old man stopped him. He told the woman what had happened and they called the police.
【适当补充细节；when 引导从句，后面应该是主句，留意主谓逻辑；同学写的那个句子不需要用过去完成时，一方面表达太过中式化，另一方面不符合语境】
In the end, two policemen came and arrested the thief.
【police 是集体名词，是复数概念；这里有数词，用policeman；划线部分句意不明，建议替换】
To sum up, the old man was really brave and he did something heroic.
【原句what caught the theif 句意不通】

同学在谓语方面需要多留意，一方面需要符合语法逻辑，另一方面表意要准确。

祝学习愉快！