"the problem being discussed is very important"求详分析being discussedbeing discussed是现在分词,过去分词还是动名词?是什么成分?为什么不直接用discussed或者discussing,要用being done,要表示被动的话过去分词足以了……那是为什么?(懂得还请针对问题回答,切勿复制,)

问题描述:

"the problem being discussed is very important"求详分析being discussed
being discussed是现在分词,过去分词还是动名词?是什么成分?为什么不直接用discussed或者discussing,要用being done,要表示被动的话过去分词足以了……那是为什么?(懂得还请针对问题回答,切勿复制,)