Step outside and you could break a leg slipping on your doormat.请问其中的slipping是什么作用?
问题描述：
Step outside and you could break a leg slipping on your doormat.请问其中的slipping是什么作用?
slipping on your doormat 是什么成分?
这是什么句法
答
动词短语加ing做状语.
这里大概是条件状语还是原因状语什么的
可以理解成Step outside and you could break a leg if you slip on your doormat.
或者Step outside and you could break a leg because you will slip on your doormat.