I would take a long walk before going to bed.为什么go要用ing形式?

来源：学生作业帮助网 编辑：作业帮 时间：2024/05/15 07:50:46

I would take a long walk before going to bed.为什么go要用ing形式?

before是介词,介词后面跟动词的ing形式.