How do you say "How am I supposed to X"?


I know/think that ~ばいい can be used, ex.

> How am I supposed to deal with this?
>
> どう扱えばいい？

But is there another way to say it? Maybe something involving はず?




Well, I still don't really understand the exact situation you're imagining,
but maybe something like

> いったいどうしたらいいの？！もうわけわっかんないよ…

is desperate enough for you? (At least, I can imagine someone crying and
saying it...)




The closest phrase to "be supposed to do" is …することになっている, and you can say
どう扱うことになっている(のだろうか)？. However, if the matter doesn't have enough
reproducibility, it's not necessarily a useful expression. In that sense,
どう扱えばいい or どう扱うべき are reasonable after all.

