原文：I found him in a field eating a stale pancake.请问这句话是不是时间状语从句？省略了从属连词？
When I found him in a field,he was eating a stale pancake.
I found him in a field,while he was eating a stale pancake.
可以这样改写吗？
还是I found him in a field.He was eating a stale pancake.这句话和原文相比，原文是由这两句话合并了？