Not necessarily. There is no word in English that requires a comma.
If it is the last word in the sentence than yes you would use the comma. Commas are so you could take a little rest between words. Examples: I like cotton candy, too! Your at this park, too? I can't believe you did this to me, too! You gossip, too?
Maybe. Maybe not. Sometimes. Othertimes not. Whether the use of a comma is or is not appropriate depends on the context.
no
No
no
NO
no
yes
Yes, you can put a comma before except. Example of a comma before except in a sentence- She can do it, except that the mountain is too steep
No, a comma is not typically used before the word "apparently" at the end of a sentence.
You do not always need to use a comma with the word sobut if you do, it is best to only use the comma before the word. An example is "The travellers faced a long drive home, so they decided to stop at MacDonald's first."
Depending on what the sentence is about you may use a comma before 'called';however, in some instances you may not be allowed to place a comma before the word called.