Before is a preposition, so it's grammatically incorrect to use it as the last word in a sentence.
Before
No, a comma is not typically used before the word "apparently" at the end of a sentence.
No, a comma is not needed before and after the word "again" if it is in the middle of a sentence.
Before is to past as after is to future.
The subordinate clause in your sentence begins with the word before.
I have had a stroke vaccine before. is a good sentence.
The monk bowed reverently before the sacred statue in the temple.
You use a when its before a word that starts with a consonant and use an when its before a word that starts with a vowel
In your sentence it is "the."
I had never heard of that before.
When its at the begining of a sentence, when its a name, or if the word EVIL is before it.