Could you provide an example? Syntax would help.
you do not have to put the comma there
it needs a comma
Not usually : "Thank you for listening to me" does not need a comma. However, if you write their name afterward ("Thanks, Fred."), you need a comma after thank you.
You do not need to use a comma after the sentence connector as well as. You simply need to join your sentences with as well as.
"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.
Yes you need a comma who was the one who thought you didn't