Ok guys sorry but for maybe the next few days im gonna try and get deep into theory from beggining to end. Ill be posting follow up quistions so I hope some of u can and will help me, for starts my guitar teacher gave me the class tab Always with me, Always with you, by Satriani, he wrote it one way and I dont know if the other way is in the song too but it goes like this

1| repeat twice
2|
3|---------7------------------0---------------4--------
4|------11---11----------4---4-----------4---4------
5|-----9-------9---------2-------2-------4-------4----
6|---7-----------7-----0-----------0---2--------------

Now he said this is in B minor, can u guys tell me why its in B minor and not jsut in the key of B? I picked up a book and its kinda hard to make everything kinda "click" but it says somthing like

[Major] |--# Sharp--> [Augmented] <--# Sharp--| [Perfect]
----\
-----\
add a flat note from a major chord/scale? and it becomes minor? is that why its in b minor?


so bassicly add a sharp to a major and its a Augmented [what is that anyway, and whats a perfect?] etc. etc.

Please let me know if im on the right track, or whatever, or if this is too experianced for me yet, Im only 15 and been playing for 2-3 years