动词ing形式作时间状语,是不是只能表示过去的事情?如果不是请举出反例
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.
我只找到表示过去的事情,能否举个ing形式表现在的例子