12 Rules For Using Commas
Without Looking Like An Idiot
1. Use a comma before any
coordinating conjunction (and, but, for, or, nor, so, yet) that links
two independent clauses.
Example: "I went running, and
I saw a duck."
You may need to learn a few grammatical
terms to understand this one.
An independent clause is a unit of
grammatical organization that includes both a subject and verb and can stand on
its own as a sentence. In the previous example, "I went running" and
"I saw a duck" are both independent clauses, and "and" is
the coordinating conjunction that connects them.
Consequently, we insert a comma.
If we were to eliminate the second
"I" from that example, the second clause would lack a subject, making
it not a clause at all. In that case, it would no longer need a comma: "I
went running and saw a duck."
2. Use a comma after a dependent
clause that starts a sentence.
Example: "When I went running,
I saw a duck."
A dependent clause is a grammatical
unit that contains both subject and verb but cannot stand on its own, like
"When I went running ..."
Commas always follow these clauses
at the start of a sentence. If a dependent clause ends the sentence, however,
it no longer requires a comma. Only use a comma to separate a dependent clause
at the end of a sentence for added emphasis, usually when negation occurs.
3. Use commas to separate
appositives from the rest of the sentence.
Appositives act as synonyms for a
juxtaposed word or phrase. For example, "While running, I saw a mallard, a
kind of duck." "A kind of duck" is the appositive, which gives
more information about "a mallard."
If the appositive occurs in the
middle of the sentence, both sides of the phrase need a comma. As in, "A
mallard, a kind of duck, attacked me."
"A mallard, the kind of duck I
saw when I went running, attacked me."
4. Use commas to separate items
in a series.
For example, "I saw a duck, a
magician, and a liquor store when I went running."
That last comma, known as the
serial comma, Oxford comma, or Harvard comma, causes serious controversy.
Although many consider it unnecessary, others, including Business Insider,
insist on its use to reduce ambiguity.
5. Use a comma after
introductory adverbs.
"Finally,
I went running."
"Unsurprisingly, I saw a duck
when I went running."
Many adverbs end in "ly"
and answer the question "how?" How did someone do something? How did
something happen? Adverbs that don't end in "ly," such as
"when" or "while," usually introduce a dependent clause,
which rule number two in this post already covered.
6. Use a comma when attributing
quotes.
The rule for where the comma goes,
however, depends on where attribution comes.
If attribution comes before the
quote, place the comma outside the quotations marks. The runner said, "I
saw a duck."
If attribution comes after the
quote, put the comma inside the quotation marks. "I saw a duck," said
the runner.
7. Use a comma to separate each
element in an address. Also use a comma after a city-state combination within a
sentence.
"I work at 257 Park Ave.
South, New York, N.Y. 10010."
"Cleveland, Ohio, is a great
city."
8. Also use a comma to separate
the elements in a full date (weekday, month and day, and year). Also separate a
combination of those elements from the rest of the sentence with commas.
"March 15, 2013, was a
strange day." Even if you add a weekday, keep the comma after
"2013."
"Friday, March 15, 2013, was a
strange day."
"Friday, March 15, was a
strange day."
You don't need to add a comma when
the sentence mentions only the month and year. "March 2013 was a strange
month."
9. Use a comma when the first
word of the sentence is freestanding "yes" or "no."
"Yes, I saw a duck when I went
running."
"No, the duck didn't bite
me."
10. Use a comma when directly
addressing someone or something in a sentence.
My editor often asks,
"Christina, is that article up yet?"
Another clever
meme shows the problem with incorrect placement of this comma.
"Stop clubbing baby seals" reads like an order to desist harming
infant mammals of the seal variety. The version with a comma, however,
instructs them to stop attending hip dance clubs. "Stop clubbing, baby
seals."
11. Use a comma between two
adjectives that modify the same noun.
For example: "I saw the big,
mean duck when I went running."
Only coordinate adjectives require
a comma between them. Two adjectives are coordinate if you can answer yes to
both of these questions: 1. Does the sentence still make sense if you reverse
the order of the words? 2. Does the sentence still make sense if you insert
"and" between the words?
Since "I saw the mean, big
duck " and "I saw the big and mean duck" both sound fine, you
need the comma.
Sentences with non-coordinate
adjectives, however, don't require a comma. For example, "I lay under the
powerful summer sun." "Powerful" describes "summer
sun" as a whole phrase. This often occurs with adjunct nouns, a phrase
where a noun acts as an adjective describing another noun — like "chicken
soup" or "dance club."
12. Use a comma to separate
negation in a sentence.
For example: "I saw a duck,
not a baby seal, when I went running."
In this case, you still need the
comma if the negation occurs at the end of the sentence. "I saw a baby
seal, not a duck."
Also use commas when any distinct
shift occurs in the sentence or thought process. "The cloud looked like an
animal, perhaps a baby seal."
How to Use a Semicolon Correctly
The most common use of the semicolon is to join two
independent clauses without using a conjunction like and.
Do you use a capital letter after a semicolon? The general
answer is no. A semicolon should be followed by a capital letter
only if the word is a proper noun or an acronym.
We
can go to the museum to do some research; Mondays are pretty quiet there.
Remember, semicolons are not interchangeable with commas or
periods. Instead, they’re somewhere in between: stronger than a comma but not
quite as divisive as a period.
1. Semicolons Connect Related Independent
Clauses
You can use a semicolon to join two closely related independent
clauses. Let’s put that another way. The group of words that comes before
the semicolon should form a complete sentence, the group of words that comes
after the semicolon should form a complete sentence, and the two sentences should
share a close, logical connection:
I ordered a cheeseburger for lunch;
life’s too short for counting calories.
Money is the root of all evil; I don’t
believe the reverse is necessarily true.
Martha has gone to the library; Andrew
has gone to play soccer.
Notice that the letter following the semicolon is not capitalized. The
examples above are both made up of two complete, grammatically correct
sentences glued together. Yes, that means there are four total sentences up
there—and thanks to the semicolon, only two capital letters. That’s exactly why
you can’t substitute a comma for a semicolon. Using a comma instead of a
semicolon in the sentences above would result in a comma
splice. And there’s nothing as painful as a comma splice.
2. Delete the Conjunction When You Use
a Semicolon
A semicolon isn’t the only thing that can link two independent
clauses. Conjunctions (that’s your and, but, and or)
can do that too. But you shouldn’t use a semicolon and a
conjunction. That means when you use a semicolon, you use it instead of
the and, but, and or; you don’t need both. Here’s a hint: if you used a comma
and an “and” to link two related ideas, think of the period (you know, the top
part of the semicolon) as a replacement “and.”
I saw a magnificent albatross, and it
was eating a mouse.
I saw a magnificent albatross; it was
eating a mouse.
You need a comma plus something to avoid a comma splice. That
something can either be the right conjunction or the period that turns a comma
into a semicolon. If semicolons can link independent clauses that would
otherwise have a period or a conjunction between them, that means they can
demonstrate contrast, too. This is part of the same rule, but the conjunction
in question is “but” instead of “and.” In other words:
This is part of the same rule; the
conjunction in question is “but” instead of “and.”
To summarize, a semicolon links up two related ideas by narrowing the gap
between the ideas of two separate sentences or by replacing a conjunction
between two related ideas. That goes for showing contrast, too: just because
two ideas are opposed or contradictory, that doesn’t mean they aren’t related
closely enough to earn themselves a semicolon.
3. Use Semicolons in a Serial List
You can use semicolons to divide the items of a list if the items are long
or contain internal punctuation. In these cases, the semicolon helps readers
keep track of the divisions between the items.
I need the weather statistics for the
following cities: London, England; London, Ontario; Paris, France; Paris,
Ontario; Perth, Scotland; Perth, Ontario.
My plan included taking him to a
nice—though not necessarily expensive—dinner; going to the park to look at the
stars, which, by the way, are amazing this time of year; and serenading him
with my accordion.
Let’s recap: so far we’ve got semicolons for linking two independent
clauses; replacing a conjunction (whether showing similarity, like “and,” or
opposition, like “but”); and long, comma-loving lists. Yup, that was one now.
4. Use Semicolons With Conjunctive Adverbs
When you have a conjunctive adverb linking two independent
clauses, you should use a semicolon. Some common conjunctive adverbs include moreover,
nevertheless, however, otherwise, therefore, then, finally, likewise, and consequently.
I needed to go for a walk and get some
fresh air; also, I needed to buy milk.
Reports of the damage caused by the
hurricane were greatly exaggerated; indeed, the storm was not a “hurricane” at
all.
The students had been advised against
walking alone at night; however, Cathy decided walking wasn’t dangerous if it
was early in the evening.
I’m not all that fond of the colors of
tiger lilies; moreover, they don’t smell very good.
These words sometimes show up in other parts of a sentence; therefore, the
semicolon rule only applies if it helps the conjunctive adverb join two
independent clauses. (See what we did there?) This conjunctive adverb rule is
similar to the conjunction rule. In both cases, check that the two ideas are
independent clauses that could stand on their own as sentences. If so, then
you’re grammatically good to go as far as the semicolon is concerned.
5. Use a Semicolon to Give a Wily Wink
Emoticons will never replace a solid knowledge of the English language.
But they can sure spice it up from time to time. 😉 The semicolon is a
good punctuation mark to have in your back pocket. Or on top of your
parenthetical smile. So whether you’re using it to whip up a good complex
sentence or to give someone a wink, now you know how to do it right.
5 Rules of Colon Usage
Colons can be confusing, that's true, but their function is
actually quite straightforward: they introduce related information. Learning
how to use colons correctly,
along with other punctuation
rules, can give your writing more clarity.
Without knowing how to effectively use colons, a writer can
end up just putting colons everywhere, nowhere at all, or interchanging the
colon with a semicolon or comma.
To avoid precisely that, let's take a look at these 5 rules of colon usage.
5
Rules of Colon Usage
There are five key rules for colon usage that should always
be followed:
1. Use a colon to introduce an
item or list, if the list comes after a complete sentence or independent
clause. For example:
·
There
are three things every dog needs: food, water, and healthcare.
·
This
year I want to visit four amazing cities: Paris, London, New York, and
Barcelona.
2. Use colons between two sentences if the second sentence
emphasizes or illustrates the first. For example:
Thinking back, our trip to Ireland was the best: we saw some
of the most beautiful terrain
this earth has to offer.
Traditionally, you had to capitalize the first word after a
colon when the colon introduced a complete sentence, but that has become a
style choice more than a rule.
3. Use a colon to introduce a bulleted or numbered list. For
example:
The English language is spectacular. There are 14 different
types of punctuation marks:
·
Periods
·
Question
Marks
·
Exclamation
Points
·
Commas
·
Semicolons
·
Colons
·
Dashes
·
Hyphens
·
Brackets
·
Braces
·
Parentheses
·
Apostrophes
·
Quotation
Marks
·
Ellipses
Note: capitalization and ending punctuation are optional for
single words or short phrases in bullet points or numbered lists.
4. Use a colon to introduce extended
quotations. You should not use quotation marks and you
should single space the quotation and indent from the left margin. For example:
Dyer's philosophy can be summed up in his belief that our
thoughts manifest our reality:
Act as if what you intend to manifest in life is already a
reality. Eliminate thoughts of conditions, limitations, or the possibility of
it not manifesting. If left undisturbed in your mind and in the mind of
intention simultaneously, it will germinate in the physical world.
5. Use a colon following a
greeting (also known as a salutation) in a formal or business
letter. It does not matter if you are using the person's first name, both first
and last name, or their title, you should always use a colon if the letter is
formal. If the letter is personal, then either a colon or comma is appropriate.
·
To
Whom It May Concern:
·
Dear
Mr. Wilson: