表达 “trust someone with your life” 用来表达你对一个人拥有完全的信任，甚至会把自己的生命托付给这个人。它暗示当你有需要时，这个人会不惜把自己置于危险的境地，毫不犹豫地帮助你，所以非常可靠。
​
例句
When I go mountain climbing, I always like to go with my friend Clive because I trust him with my life and know he would do anything to help us get down safely.
我去爬山的时候，总喜欢和我的朋友克莱夫结伴同行，因为我可以把我的生命托付给他，我知道一旦发生状况，他会竭尽全力地帮我安全下山。

I really miss my friend Liu Xi. I haven’t seen her for ages, but I still know I can trust her with my life. She is really reliable!
我很想念我的朋友刘希。我已经很久没有见到她了，但我知道我可以完全信任她。她真的很可靠！

I trusted my best friend with my life, until I found out he spoke ill of me behind my back!
我曾经完全信任我最好的朋友，直到我发现他在背后说我的坏话！