不会让你失望 用英语

I won't let you down
let sb down使某人失望

看到题目，立刻想到的是
I will never let you down.
看到上面的答案，感觉这样说合适
I will never disappoint you.

I won't let you down.
I won't make you disappoint.

我同意上面的两个翻译
如果是I won't let you disappiont me意思是我不会让你使我失望的
disappoint 应该这样用I won't disappoint you.

i won't let you down.
I won't fail you.
i won't disspoint you.

像楼上说的, I will not let you down.
或者也可以说 I will not make you dissapointed.