the world has changed for the better . what has happened here? 这2句怎么用现在完成时

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theworldhaschangedforthebetter.whathashappenedhere?这2句怎么用现在完成时theworldhaschangedforthebetter.whathas

the world has changed for the better . what has happened here? 这2句怎么用现在完成时
the world has changed for the better . what has happened here? 这2句怎么用现在完成时

the world has changed for the better . what has happened here? 这2句怎么用现在完成时
按照我的理解是,眼下看到世界已经变得更好了,当然是世界完成了“变好”
我们才能说他变好了是吧.
至于后面的“其中发生了什么?”是同样的道理,我们看到了后果,那事件当然是完成了的……