recently I've been talking to some japanese people and came across a problem that might sound stupid but I really had troubles expressing what I wanted.
I know the different forms to express obligations, it's been a while and I have no problem using them when I need to talk about what I have to do, however, I've found myself in a really stupid situation when a japanese friend asked me something about a game, and I wanted to say something like :
After you do this, you will have to do that.
But I had no idea how to express this kind of "obligations".
【～ないといけない】, 【～なければいけない】, 【しなくてはいけない】 etc. just sounded wrong to me...
In this kind of moments I stress and panic it really frustrates me not knowing something like that, so I end up speaking gibberish and changing the topic which makes me look like a complete idiot
So I would like to know how to express this sort of obligations in the third person, and how to ask someone what he has to do?