It depends on the context. If you are listing items or using it as a conjunction to link two complete clauses (complete clause meaning contains both subject and verb), you would use a comma before "or."
Examples:
Do you want juice, milk, or water with your meal?
I will either do homework tonight, or I will go out with my friends.
I will either do homework tonight or go out with my friends.
In the last example, there is no need for a comma because the subject is shared by both verbs.
It entirely depends on the context. In some contexts you would put a comma before that word, in some contexts you would put a comma after it, in some contexts you would put a comma both before and after it, and in some contexts you would not put a comma either before or after it.
A comma corresponds to a place where you would pause if you were speaking the sentence aloud. There are absolutely no rules about which punctuation you have to use with specific words. English is not such a restricted or restrictive language.
No
no
no
Not necessarily. There is no word in English that requires a comma.
yes
no
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.
Yes, you can use a comma before the word "but" when it connects two independent clauses. For example: "I wanted to go to the store, but it started raining."
You do not typically use a comma directly before or after the word "but" when it is used as a conjunction to connect two independent clauses. However, you may use a comma before "but" when it is used to introduce a contrasting element in a sentence.
No, a comma does not go before the word 'in'.