would be done 和would be doing的区别和用法,能否举例说明 请附带翻译可以么

would be done表示过去将来时
例如：
He said that something would be needed to finish the task.
他说要完成这项任务,需要某种条件.
It was said that they would be selected by lottery.
据说他们将抽签选出.
would be doing 表示过去将来进行时
例如
If you don't stop me,I would be playing in the park now
要不是你阻止我,我这会儿就正在公园玩呢