How this happened is still a question是否可换成it is still a question how this happened为什么

问题描述:

How this happened is still a question是否可换成it is still a question how this happened为什么

可以转换 这就是英语经常应用的句型转换啊.
it is .引导的强调句 这样在it is 后面的那部分就是被强调的部分.