work on it had begun before my sister left(这是什么句型?
问题描述：
work on it had begun before my sister left(这是什么句型?
答
楼上不懂的别乱说.这不是病句好不好.
其实并不是什麽特别的句型,on it是修饰work的,这么多人看不懂就是因为这个.你把on it去掉的话就明白的了.
Work (on it) had begun before my sister left.
(关於这件事的)工作在我姐姐离开前就已经开始了.