以a开头的形容词有什么特征

They had relinquished all hope that she was alive.

他们已经完全不指望她还活着了。

Ed was alive with happiness.

埃德高兴得眉飞色舞。

She had despaired of ever being rescued alive.

她那时对获救生还已经绝望了。

They kept her alive on a life support machine.

他们用呼吸机维持她的生命。

I never expected to feel so alive in my life again.

我怎么也没想到自己会再一次这样活力焕发。