Could you provide an example? Syntax would help.
you do not have to put the comma there
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.
You only need one space after a comma.
It is usually not necessary.
No.