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I think in the first one, I don't need a comma before "and" cause they are short sentences. In the second however, I'm wondering whether I need the comma before "and" since it is a coordinating conjunction separating two main clauses... What do you say?

1) Yesterday, I went fishing,and John played cards.

2) In 2007, many people worked on the XY-Project, and several people were included in that process.

Thank you! ;)

marked as duplicate by Edwin Ashworth, Xanne, Nigel J, RaceYouAnytime, choster Nov 28 '17 at 4:12

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You don't need any commas in #1, but it would read more smoothly if you said, "I went fishing yesterday and John played cards."

#2 is confusing and/or redundant. Several means just a few. But you've just said many people worked on the XY-Project. So it seems that the "process" is different from the XY-Project. Or is it? Who can tell? The entire sentence needs to be reworked or split into two sentences. Merely adding or deleting commas won't fix it.

  • Don't take the content to seriously, take a similar example: In 2007, many people bought apples, and many supermarkets didn't have enough apples to sell. – Faust1808 Nov 25 '17 at 16:04
  • is the comma before "and" mandatory? (since it is a coordinating conjunction joining two independent clauses?) – Faust1808 Nov 25 '17 at 16:04

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