Punctuation Basics

Punctuation

Below is a description of the most common punctuation marks and their proper usage. They are listed in functional order, starting with those that end sentences, followed by those that fall in the middle of sentences, and finally those that fall in the middle of words.

The Period

A period looks like this: . It is used to end a sentence. You should not use a period for anything other than ending a sentence. (A period also makes up part of an ellipsis, but that's another story.)

The Exclamation Point

An exclamation point looks like this: ! Like the period, the exclamation point is used to end a sentence, but it also adds emphasis. When you're writing dialogue and a character is shouting, you might want to end the sentence with an exclamation point. Example::

"Gabrielle, look out!" yelled Bill.

The Question Mark

A question mark looks like this: ? Like the period and exclamation point, the question mark is used to end a sentence, but only when the sentence is a question. Example:

"Bill, where are we going?" asked Gabrielle.

The Comma

Ahhh, now things are getting a little more complicated.

A comma looks like this: , Commas have several uses:

Commas serve to separate two ideas in a sentence. The two ideas are so closely related that they can't each stand alone; if they could stand alone (that is, if each idea could be its own sentence) you should either use a semicolon or a period. (The preceding sentence is a good example of this.) Especially look for words like "and," "but," "or," etc.
Example:
```
Gabrielle was tired, but she kept walking.
```
Commas separate multiple adjectives that are describing the same thing.
Example:
```
Gabrielle ran her fingers through the cat's long, soft hair.
```

Commas separate lists of three or more.
Examples:

Gabrielle ate chicken, fish, and berries for lunch.
Bill jumped up, spun around, and drew his sword.

Note that if any of the items in the list use commas, the list separator becomes a semicolon:

Bill jumped up; spun around; and drew his sharp, shiny sword.

Commas set off subordinate clauses that qualify the main clauses.
Example:

Seeing Gabrielle fall, Bill hurried forward.
Since she was hungry, Gabrielle ate some berries.
If you love chocolate, you should try Oreos.

Commas come after exclamations or other one-word interjections.
Examples:

Oh, Bill abandoned Gabby again.
No, I'm not hungry.
Oops, I broke the frying pan.

Commas set off non-essential clauses in the middles of sentences.
ALWAYS USE THESE COMMAS IN PAIRS!
Examples:
```
Bill, who is from Amphipolis, is sitting next to you.
```
BUT
```
The man sitting next to you is from Amphipolis.
```
Note the difference between the two sentences above. In the first, the main point is that Bill is sitting next to you. The fact that he's from Amphipolis is not important. If you have constructed the sentence properly, you should be able to remove everything between the commas and still have a coherent sentence. In this case, it would be "Bill is sitting next to you." In the second sentence, the fact that he's from Amphipolis is the main point of the sentence, hence no comma is used.
There are three general types of word/phrase that should go between these commas:
- Descriptive phrases that are not strictly necessary, such as "who is from Amphipolis" in the above example.
- Names. "It's your fault, Bill, that I'm all wet."
- Non-essential comments or qualifiers such as "however," "nevertheless," "so to speak," etc.
Commas come after "he said," "she said," and other speaking verbs when they are in the middle of the spoken quotation.
Examples:
```
"Bill," said Gabrielle, "what are you doing?"
"I don't know why," said Bill, "but I feel like jumping."
```
BUT
```
"I'm tired, Gabrielle," said Bill. "Let's get some sleep."
```
Note that in the third example, a period follows the speaking verb rather than a comma. This is because two sentences are spoken: if you had moved the speaking verb to the end, you would have "I'm tired, Gabrielle. Let's get some sleep," said Bill.
Also note that after a spoken quotation, the next word should ALWAYS be uncapitalized, unless of course it is a name.
The following examples are ALL incorrect:
```
"Gabrielle, stop it." cried Bill.
"Gabrielle, stop it!" Cried Bill.
"Gabrielle, stop it," Cried Bill.
```
The correct forms would be:
```
"Gabrielle, stop it," cried Bill.
"Gabrielle, stop it!" cried Bil.
```
This is possibly the hardest one. A comma is also used to prevent confusion when there is more than one possible interpretation of a sentence.
Example A:
```
Above the mountains rose like purple shadows.
```
Try putting a comma in different parts of the above sentence and see how different the meanings are.
Example B:
```
My sister Sarah has a cat. 
My sister, Sarah, has a cat.
```
The first sentence implies that I have more than one sister. The name Sarah indicates which sister I am speaking of at the moment. The second sentence implies that I have only one sister. The commas setting off her name indicate that the name is a nonessential qualifier. (Remember, try removing everything between the commas.)
Example C:
```
Sarah, my sister, has a cat.
Sarah, my sister has a cat.
```
The first sentence is, again, an example of nonessential qualifier. I could say "Sarah has a cat" and presumably you know that Sarah is my sister. The second sentence is addressed to Sarah. I am telling Sarah that my sister, whose name is not specified, has a cat.

The Colon

A colon looks like this: : It appears at the end of a clause and can do one of three things.

A colon can introduce a list. Be sure that what comes before the colon could stand as a complete sentence on its own.
Correct:
```
Mary has many skills: running, jumping, fighting, and sewing.
```
Incorrect:
```
Mary's skills include: running, jumping, talking, and sewing.
```

A colon can introduce a restatement of the previous clause.

Bill is a warrior: he spends a lot of his time fighting
battles.

A colon can introduce an elaboration on the previous clause.
```
Gabrielle was in pain: she had just sprained her ankle.
```

Note that the distinction between restatement and elaboration can sometimes be subtle.

Also note that some people like to capitalize the first letter of the first word after the colon: They believe it is more stylistically appropriate. The previous sentence is an example. Whether or not to capitalize is up to you; just be careful to be consistent.

The Semicolon

A semicolon looks like this: ; Semicolons have essentially two uses.

A semicolon separates items in a list when the items themselves have internal punctuation.
```
Gabrielle likes oranges; cherries; and red, yellow, and green apples.
```
A semicolon separates two closely related clauses. In this function, it is slightly stronger than a comma, but weaker than a period. The clause before the semicolon and the clause after the semicolon should be complete sentences on their own; you should be able to replace the semicolon with a period and have two grammatically correct sentences. The previous sentence is an example.

The Apostrophe

An apostrophe looks like this: ' In general, apostrophes have two uses: replacing removed letters in contractions, and indicating possession.

Removed letters: Consider the word "isn't." We all know this is a contraction of two words, "is not." The apostrophe in "isn't" replaces the letter O in "not." Similarly, the apostrophe in "can't" replaces the letters NO in "can not," the apostrophe in "we're" replaces the letter A in "we are," and so forth.
Possession: "This is Bill's whip." In this case the apostrophe does not replace a letter; it indicates possession, i.e. "This whip belongs to Bill." Possessives get really tricky when you apply them to multiple people. For example:
This is Bill's and Gabby's whip.
Translation: This whip belongs to Bill and Gabby.
This is Bill and Gabby's whip.
Translation: This is Bill, and this is a whip belonging to Gabby.
The exception to the possessive rule - and the one which gives most people a lot of trouble - is the word "its" meaning "belonging to it." Unlike most possessives, "its" does not contain an apostrophe. It is just one of the many cases where the English language is unnecessarily complex. The trouble with English is not that it has too many rules - it's that there are too many exceptions to the rules. But "its/it's" is a case wherein it's good to remember Case 1 from above. If the word is "it's," ask yourself, "What letter has been removed?" The answer clearly is "i." The letter i from "it is" has been replaced by the apostrophe.
So, to clarify:
Its = belonging to it. "The frying pan has a dent in its handle."
It's = it is. "It's not my fault the frying pan is dented!"

This is Bill's and Gabby's whip.	Translation: This whip belongs to Bill and Gabby.
This is Bill and Gabby's whip.	Translation: This is Bill, and this is a whip belonging to Gabby.