Phoenix is a place inside Arizona-that's why there's a comma between the city and state. You can see this rule in action on any mailing envelope. There are certain types of place names (for example, city/ state and state/ country) that are always separated by a comma when you write them out. Like the rule for joining sentences, the comma goes right before the conjunction. The last item is usually joined by a conjunction like and, or, or nor. Just place a comma between each item (and an appropriate punctuation mark at the end). Placing the comma after the conjunction would be incorrect because the conjunction is part of the second thought.Ĭommas can also be used to separate three or more items in a list. It tells you where one thought ends and another begins. We do it all the time in regular conversation, if not in writing.Īs you can see, the comma goes between the two sentences, right before the conjunction. You already know how to join two sentences using conjunctions like and, or, but, and so. You don't have to worry about any special exceptions or wonder where the comma is supposed to go. In other words, they're easy to apply to your writing because they always work the same way. The basic rules for using commas are pretty foolproof. In these cases, you have to understand the meaning of the sentence to know when and where to use the comma. They work the same way every time, so you don't have to think about them too much. With a little practice, it'll start to feel like second nature. There are many rules that tell us how commas should be used, but don't let it scare you. Mainly, it's used to separate things-for instance, two thoughts in a sentence, multiple adjectives, or items in a list. en/grammar/abbreviations-and-acronyms/content/ What is a comma?Ī comma is a punctuation mark that can be used in many different ways.

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