有个句子
Four days after the accident, the authority is putting the new plan for
traffic control into action.
类似的:
Four days after leaving China
Four days after operation
Four days after I leave
时间段+after+ing/n./句子(after可以做连词)
后面after接的成分一直没搞明白规律,什么时候可以加一个名词,什么时候加一个ing分句,什么时候加一个句子(after有时候可以做连词)。比如accident后面没有ended,老师可以解答下吗?

