I'm very much afraid that the supplemental questions you have posed here indicate clearly that you have understood rather less well than you think. I therefore don't believe that there would be much point in my giving detailed answers to these questions, when they would be likely only to breed more of the same.
I think that, before posting any further questions on technical grammatical distinctions, you really need to go away and carefully study several introductions to English grammar, aiming to acquire a sound basic knowledge of the meanings of all the relevant terms. Only then will there be any real value in asking whether a certain word is an adverb or a conjunction.
I am also forced to wonder what motivates you to post such questions as you do: if you are aiming to teach grammar, then you clearly need to gain a much better grasp of it yourself before doing so. If, on the other hand, you are a student of grammar, then questions such as those you pose would surely be better addressed to your teacher/tutor.
I trust that you will not take offence at these suggestions, but rather take them in the constructive spirit in which they are offered.