Then he dressed their baby daughter and took the child for a walk before leaving for work.
问题描述：
Then he dressed their baby daughter and took the child for a walk before leaving for work.
这里不是过去式么,为什么后面要用leaving
答
因为：before 在……之前,是介词,而介词后的动词要用ing 形式.
如果不明白,请再问；如果对你有所帮助,
请点击本页面中的“选为满意回答”按钮,那动词除了在介词后还有在什么地方要加ing进行时态呀，或动名词作主语呀，或现在分词作状语呀，平时要多积累哦！如 He is reading English.Reading in bed is bad for your eyes.There is a shop selling all kinds of things there .