The mother who lost her son insisted the careless driver was to blame for the traffic accident happening yesterday.
问题描述：
The mother who lost her son insisted the careless driver was to blame for the traffic accident happening yesterday.
请问下happening能换成happened吗?为什么
happen做非谓语动词不是可以用过去分词的吗？
答
不可以,for 是介词,happening用作动名词以构成介宾形式
而且事情只能主动发生不能说被发生