问题描述：
例：
1.Seeing my parents waving in the crowd,I went running to them.
2.Crossing the road,the old man was knocked over by a car.
动词ing形式作时间状语,是不是只能表示过去的事情?
1.Seeing my parents waving in the crowd,I went running to them.
2.Crossing the road,the old man was knocked over by a car.
动词ing形式作时间状语,是不是只能表示过去的事情?
问题解答：
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