It depends on the type of sentence. So your answer would be not all the time.
I hope that helps! :)
Yes
In the U.S., "e.g." almost always needs a comma before and after. (According to the Chicago Manual of Style and others.) Usually when we say, "for example," before listing examples, we offset "for example" by commas. An abbreviation meaning the same thing is no different. But I understand that in the U.K. they often leave out the comma. I can't verify that.
Not necessarily. There is no word in English that requires a comma after it or before it.
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
You would use a comma before it. Xerox, Inc.
Yes
Not necessarily.
No. There is no word in English that always requires a comma before it.
Sometimes, but not always. There is no one single rule that applies to "but." ----
A comma would typically go after "for instance" because you're about to give an example of something. You will frequently find a comma where you take a breath in that sentence.
no
No
Not necessarily. There is no word that always requires a comma before it.
no . Additional: 'Which' sometimes has a comma before it, but it depends on the sentence. I find it hard to imagine a situation when 'which' would have a comma after it.
A period should come before the footnote at the end of a sentence, while a comma should not.
,Always.
It could go either ways?