英语翻译如题.首先那孩子英文很好、希望英文翻译的要那人.一下就看明白.千万不要词不达意、、、谢谢、、、

what i am asking is one thing if only

I only want a what-if thing from you.

I require only one "what if" of you.
语法：
require sth of sb.:要求没人（做）某事