问题
填空题
John ran up to him and helped him to stand up.
______ up to him, John helped him to stand up.
答案
参考答案：Running
解析：[名师解析] 现在分词可以放在句首，引导一个表示时间、原因、伴随状态的状语。 Running引导的是一个说明主句谓语动词helped的时间状语，表示，running动作在先，help动作在后。