She clung to the hope that her son was still alive.

　　她始終抱著(zhù)兒子還活著(zhù)的希望。

　　Are your grandparents still alive?

　　你的祖父母還在世嗎？

　　Although he is eighty, he is still very much alive.

　　他雖有八十歲了，但仍然充滿(mǎn)了活力。

　　He is fully alive to the possible dangers.

　　他充分注意到會(huì )有危險。

　　The city was all alive when he arrived.

　　當他到達時(shí)，城里非常熱鬧。