She did not regain consciousness and died the next day.

她再也没有苏醒过来，第二天便去世了。

《牛津词典》

When will she regain consciousness?

她何时会恢复意识？

youdao

But I regain consciousness very quickly come over.

但是我很快就清醒过来。

youdao

While the responses did not mean Mr Sharon was likely to fully regain consciousness, doctors said they were "encouraging".

BBC: Ariel Sharon: Israeli ex-PM in coma 'has brain activity'

But if the affected person has suffered severe brain damage, he or she may sustain permanent disabilities or may never regain consciousness.

CNN: Coma

Once domestic bond investors regain consciousness and they will most likely do so in concert with foreign holders of US debt and currency a debt and dollar crisis will emerge.

FORBES: Why David Tepper Is Only Half Right