It depends: usually you do, but if you say "again and again and again" you wouldn't put a comma.
Ex: Yes - "If you want to play again, give me a token.
Ex: No - " You can play again and again."
No
It is usually not necessary.
To seperate the words in a sentence.
When its not used in a list for example you will need to stay safe here ,and remember to stay with us
Before EX: I need eggs, and butter.
It really depends upon the sentence. Remember, a comma indicates a slight pause. If you would pause when speaking that sentence at that location, then put in a comma to indicate that.
It is not proper to use a comma after the word "thanks" in the phrase "thanks again."
you do not have to put the comma there
No, a comma is not needed before and after the word "again" if it is in the middle of a sentence.
it needs a comma
"In five years, things happened." Yes you do need a comma.
No. There is no word in English that always requires a comma before it.
Not necessarily. The comma indicates a pause in speech. Use a comma after "but" only to indicate a noticeable pause in speech. If there is no pause, there should be no comma.
No
No, you do not need to put a comma after "To begin with" when it is used as an introductory phrase in a sentence.
Exclamations are typically separated from the rest of a sentence by a comma. "Oh! I didn't know that!" "Oh, it isn't that important."
Only proper nouns and I are capitalized after a comma. But is a conjunction, so no, it doesn't need to be capitalized.