Según del sitio conjugation.org, el subjuntivo presente del verbo adelgazar es: yo adelgaze tú adelgazes él/usted adelgaze nosotros adelgazemos vosotros adelgazéis ellos/ustedes ...
The imperfect subjuntive has two forms. For example: Ojalá viniera. Ojalá viniese. I think both has the same meaning. However, is there any subtle difference?
What is the rule for conjugating verbs in the vos form in the present subjunctive? If it varies by region, what are the differences?