Comma and semi-colon rules (review) from Purdue Owl

Please use the link below to visit the site —

If it does not load, simply go to the Purdue Owl section on punctuation.

Almost EVERYONE could use a review of comma rules.

90-Second Semicolon” vidcast series on the Purdue OWL YouTube Channel.

Commas are used

1.  After an introductory word or phrase

Ex.  Therefore, they left the party giddy.

2.  Around non-essential clauses

Ex.   The Spanish professor, in the puce, three-piece suit, seems creative.

3.  Between city and state — and between month date, and year

Ex.  145 College Road, Suffern, NY

December 1, 2013 marks World AIDS Day.

4.  Before a conjunction to join two independent clauses:

He eats like a bear, and he is almost as hairy!


In the United Kingdom, semi-colons are frequently used before a conjunction.  But in the US, we use a comma + a conjunction to join two complete ideas instead .  Conjunctions to couple with a comma include: and,but, for, nor, or, so and yet.


5.  Use a semi-colon to joing together two complete ideas that are related (either to extand an idea or to demonstrat contrast).

The winter is beautiful; however, I prefer summer.


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