大家好，最近听到一个句子是 When I was a kid, baling a field of hay that big would have taken a really long time and it would have all been done with manual labor. 他是提到现在收割打包很快，但以前要花很多时间，而且要全靠人工 想请问大家，他后面那边 (1)接would have pp 跟 接简单过去式 听起来的感觉差在哪呢 (2)后面用简单过去式也可以吗? 谢谢