ÎºÎ±Î¸Î¯Î·ÏƒÎ¹ is the 3rd person singular present of ÎºÎ±Î¸Î¯Î·Î¼Î¹, which is ÎºÎ±Ï„Î¬ + á¼µÎ·Î¼Î¹. Also, for Î´Î¹Î´ÏŒÎ±ÏƒÎ¹ vs. Î´Î¹Î´á¿¶ÏƒÎ¹, that's indicative vs. subjunctive. For me, the Î¼Î¹-verbs were a real problem, and I just had to sit down and memorize the forms (in my case, I wrote them out over and over again). I'm not sure they can be learned any other way.
Edit: I see I was too late, but yeah, the Î¼Î¹-verbs are problematic