I've seen read a lil bit about subjunctive mood. And the present subjunctive mood works like this: am -> be "I demand that I be available".
I often see wishes like that: "I wish, I would be good in math".
But can't I say: "I wish, I be good in math"? Why do people use would here?
It's a past tense.
Or another example:
"If I were you, I would be available". Its common to use it. But I want to describe it in present tense. Why don't I say: "If I be you, I would be available", because when I use that its clear that nothing else then the present is meant.