@Nat093,
I would like to ask you just one more question.
Let's say that I use the Oxford comma within a piece of writing. I want to refer to an author who writes that:
In many cases compounds have different semantics from phrases. Take the phrases
black bird,
dark room and
greenhouse. Compare their meanings with the compounds
blackbird,
dark room and
greenhouse.
Then, if I want to paraphrase the text, should I put a comma before 'and' (just for the sake of consistency)?
For example:
Take the phrases
black bird,
dark room, and
greenhouse and compare their meanings with the compounds
blackbird,
dark room, and
greenhouse.
Incidentally, I have noted that many authors vary in their use of a comma withing one piece of writing.