Isn't Dracula the name of a vampire? Count Dracula?

What is a tense exactly and what tenses are there? Of course past tense and the likes are tenses, but what about past simple? Is that a tense?

This is kind of a general question and might take a long reply but....could someone tell me how the subjunctive mood works exactly in English. And mainly, the forms it can be found in. (Besides "Viva la revolution"-type sentances, that's the one

Thank you.

I've actually heard people say that. Cacti works with Latin though.

I was just wondering, the english singular-plural things, are they derived from Latin? As in alga-algae, which fits into Latin, female nominative (femina-feminae), but I've also heard people say cactae as the plural of cactus (among other things),

What are the words I, you(singular), he, we, you(plural) and they called?

What would over mean here then? "instead of"?

I found "o'er" in the lyrics of a song, can anyone tell me what that means? The sentance: "If thou wouldst draw a veil for Me O'er lengthening scars of age and grief"

Thanks.