Using the Period
When to use a period is usual not a problem because it indicates the end of a declarative sentence. However, it isn't always easy to tell when a sentence should end or not. The period is also used to mark abbreviations and decimal points.
1. Use a period to mark the end of a declarative sentence.
Ex. A: The pictures were coming out so quickly that the printer could not keep up with them.
Ex. B: The most recent stock purchase did not do well, although the rest of the portfolio made good gains.
Ex. C: Never use a sentence fragment unless you can provide a good reason.
Ex. D: Theronia asked her clients whether she should take the case to the Supreme Court or accept the decision handed down by Judge Realto.
Caution: Do not use a period where you need a comma. Doing so will create a sentence fragment, and writers should use sentence fragments only when they can provide a good reason for doing so. The incorrect examples below are not complete thoughts and do not indicate a good reason for their use.
Incorrect: Since Seņora Devon y Galtierra was not made an officer of the court.
Correct: Since Seņora Devon y Galtierra was not made an officer of the court, she could not argue the case before the judge.
Incorrect: Simply giving and never receiving, sacrificing and never being selfish, or seeking peaceful resolutions and never choosing war.
Correct: Simply giving and never receiving, sacrificing and never being selfish, or seeking peaceful resolutions and never choosing war are the hallmarks of a true spiritual leader.
Ex. C: "Did you believe him when he said that he wanted to work with everyone involved?"
"No, absolutely not.
Explanation: The above example is clearly a fragment, but it is justified by the context in which it was used. If writers want to use a sentence fragments, they can, but readers must be able to see clearly that the fragment's use is justified.
2. Use a period to indicate an abbreviation or to mark a decimal point.
Ex. A: Throughout the sixth century B. C. E. (before the common era), the Buddha was preaching throughout China.
Ex. B: Taken literally, the results were 6.2% worse than they were a year ago.
2. Always put a period inside quotation marks.
Ex. A: Carolyn replied, "I've always wanted to go to Iceland to swim in the Blue Lagoon." A few months later she did.
Ex. B: There is no reason for anyone to react physically because she or he feels "disrespected."
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