与come about 有关how did it come about that such an unexpected event had happened?这个句子怎么理解啊.翻译成什么,句子中的it应该是指代后面的THAT从句,

与come about 有关how did it come about that such an unexpected event had happened?这个句子怎么理解啊.翻译成什么,句子中的it应该是指代后面的THAT从句, 英语翻译比如说：How did there differences come about?(come about) come out与come about的区别 come along 与come about的区别? What about 与How about的用法? what about 与 how about的区别 英语问题how the accident come about?这里的come about为什么不用过去式 How about _____ (come) out to play baseball? happen与come about的区别两个的意义接近，但come about多与how连用，而happen多与what连用,这是不是它们唯一的区别？还有其它用法上的区别吗？当句子为陈述句时，没有what和how时，happen和come about come about HOW ABOUT与WHAT ABOUT意思是?区别与联系 How come! how well与what about一样吗? 与单词come有关的词组? what about与how about用法的区别 how about与 what about后各跟什么词 用what about与how about各造一个句子 how about you与 What about you 的区别?