wish可以用would have done.但would rather不可.
would rather （had rather）+宾语从句：虚拟现在或将来,用过去时；虚拟过去,用过去完成时.例如：I’d rather (that) he were here now .我倒希望你明天去那儿.We’d rather you went there tomorrow.我们倒想你明天去那儿