We've no idea what his state of health is but at least we know he is still alive.

我们不清楚他健康状况怎样，尽管如此我们知道他还活着。

《柯林斯英汉双解大词典》

He is still alive and kicking.

他还是生龙活虎的。

youdao

I doubt whether he is still alive.

我怀疑他是否还活着。

youdao

He thinks she is still alive.

VOA: special.2009.07.04

I have to tell you that Levi-Strauss, who is still alive, a very old man, expresses great bitterness in his old age about what he takes to be the displacement of the importance of his own work by what happened subsequently.

现在列维仍然在世，年事已高，晚年他表达了,自己对作品的重要性,后来被取代的痛苦。

耶鲁公开课 - 文学理论导论课程节选

You know the series is going to keep going and there are hopes that he is still alive???

FORBES: Move up http://i.forbesimg.com t Move down

The United States says it does not know where Saddam is, or even whether he is still alive.

CNN: Saddam still in Iraq - UK minister

The video offers no clues as to when Roy Hallums' captors made the video or whether he is still alive.

CNN: U.S. hostage pleads for life in tape