was being done 是被动语态的过去进行时态,是说某件事情在过去的一个时间点正在被做
has been done 是现在完成时的第三人称单数做主语的形式
例如:
The research was being done when the professor went into the lab last night.
The research has been finished.
was being done 是被动语态的过去进行时态,是说某件事情在过去的一个时间点正在被做
has been done 是现在完成时的第三人称单数做主语的形式
例如:
The research was being done when the professor went into the lab last night.
The research has been finished.