I slipped on some damp leaves,fell out,scratched my arms and cut the heel of my foot.

题目

I slipped on some damp leaves,fell out,scratched my arms and cut the heel of my foot.
这句话scratched my arms and cut the heel of my foot应该是非谓语做伴随状语么、为什么要用过去分词呢?scratch和cut与I又不是动宾关系?应该不是用ing么

答案