2 sentences for 死活 (sǐ​huó)

1. 她的地址死活想不起来。

   tā de dì​zhǐ sǐ​huó xiǎng bu​qǐ lái.

   I can't for the life of me remember her address.

   Source: Tatoeba

2. 你甚至连他的死活都不知道。

   nǐ shèn​zhì lián tā de sǐ​huó dōu bù​zhī​dào.

   You don't even know if he's dead or alive.

   Source: OpenSubtitles