ShakeyX, may I give some advice to you?

The questions you ask are good questions, they are "deeply thought" (BTW, is there such an expression in English)?
But they relate to the very basics of the Russian grammar, and any good grammar book surely explains everything of this stuff.

You are welcome to ask your questions in the forum, but I would advise you to find a Russian reference grammar book. There should be a rich choice of them!