英语who was it invented by 用who 还是whom?教科书中是who 为什么有作业本上是whom呢 求教 不要复制或者长篇大论~ 简练

英语who was it invented by 用who 还是whom?教科书中是who 为什么有作业本上是whom呢 求教 不要复制或者长篇大论~ 简练
英语who was it invented by 用who 还是whom?
教科书中是who 为什么有作业本上是whom呢 求教 不要复制或者长篇大论~ 简练

英语who was it invented by 用who 还是whom?教科书中是who 为什么有作业本上是whom呢 求教 不要复制或者长篇大论~ 简练
都对,因为口语中常用who 代替whom,但如果把BY 提前,只能用whom,即
By whom was it invented