Do you know the difficulty he had finishing the work为什么用finishing而不用to finsh?不能理解为 he had 作为定语从句修饰the difficulty,to finsh是为了完成吗?

问题描述:

Do you know the difficulty he had finishing the work
为什么用finishing而不用to finsh?不能理解为 he had 作为定语从句修饰the difficulty,to finsh是为了完成吗?