Punctuation for connecting words

Punctuation for Connecting Words GR6.32
C. Klassen & J. Robinson/Revised Winter 2009
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Learning Centre
PUNCTUATION for CONNECTING WORDS
(Explanations, Exercises, and Answers)
A connecting word helps you clarify to a reader how one idea logically links to the next
idea. However, using these words with the correct meanings is only half of the battle.
The other half is learning to punctuate them correctly.
While this handout does not provide a complete explanation of punctuation rules, it
provides basic guidelines that should help you avoid making most of these sentence-
level punctuation errors. It is important to know that punctuation rules can sometimes
be broken. However, to be safe, it is better for you to use these guidelines until you
become very familiar with punctuation possibilities. If you would like just a quick
reference for these rules, ask for the Learning Centre handout entitled Quick
Reference for Punctuating Connecting Words.
To improve your punctuation of connecting words, you need to know
-how to locate clauses in your writing
-how to punctuate four (4) different types of connecting words
What are Clauses?
A clause is like a simple sentence. It expresses a complete idea. A clause must have
both a subject and a complete verb. Here are some examples of clauses:
the student walked across the concourse
Jessica has been playing the piano for an hour
the table was set for dinner
the baby was crying all night
Discuss with your tutor how subjects and verbs can be located. For more practice identifying
subjects and verbs, work on the Learning Centre handout Subject/Verb Agreement.

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Notice in the next set of examples that you can add connecting words to these ideas,
and they are still clauses because they have subjects and complete verbs; however,
they cannot stand on their own any longer as completed thoughts because they need
another clause to complete the thought.
when the student walked across the concourse
if Jessica has been playing the piano for an hour
because the table was set for dinner
even though the baby was crying all night
The following examples are not clauses. Can you see why not? Discuss with your tutor
how the following phrases are different from the clauses in the two sets of examples on
the previous page.
walking across the concourse
Jessica at the piano for an hour
a set table
the baby crying all night
Below you will find explanations, examples and exercises for four (4) different types of
connecting words
1) Co-ordinating Conjunctions
The most common co-ordinating conjunctions are “and, or, nor, but, yet, so.”
Clause Co-ordinator Clause
Chris decided to transfer to UBC , and John decided to apply at SFU.
You will notice in the examples on the next page that you do not always need to
include a comma before some co-ordinating conjunctions. With the connectors “and”
and “or”, if clauses are short and closely related (such as cause and effect), then
commas are not generally used. The best way to decide if a comma is needed with
“and” and “or” is to decide if there is a clear pause when you read the sentence out
loud. However, the other connectors “but, yet, and so” should almost always have
commas before them if they separate two clauses.
*
*
It is important to know that “and” and “or” are also frequently used to join words and phrases in
lists that are not complete clauses. The punctuation rules for making lists are different than for joining
clauses. If you would like to learn rules for punctuating lists, ask a tutor for the Commas handout.

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Co-ordinators Examples
and She loved that movie. It was exciting, and her favorite actor
had the lead role.
Sometimes the demand goes up and the price does not fall.
or You could take the children to the park, or you could take
them to a movie.
We need to go now or we will be late for class.
but James decided go to a movie, but Kim stayed home to
study.
so He made a lot of mistakes, so he had to do the assignment
again.
yet Carl usually gets at least eight hours of sleep most nights,
yet he’s always tired.
Exercise 1:
Combine the following groups of sentences into longer sentences by using “and, or,
but, so, yet;” Use correct punctuation.
1) Carlos lives in Canada
He was born in Peru
2) The car ran out of gas
Bob had to walk two kilometers to find a gas station
3) Maria could go to art school in New York
She could stay in Vancouver to look for a job
4) Penelope likes to drive fast
She got too many speeding tickets
She lost her driver’s license

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Add correct punctuation (periods and commas) to the following paragraph:
Exercise 2:
Mark loves to travel but Amy doesn’t so they often argue about where to spend
their vacation time one summer they decided to try something different Mark went to
Thailand but Amy stayed home Mark’s brother, Alex, and sister-in-law, Jennifer, went
with him they knew that they could only spend one week in Thailand so they had to
decide what to do they could all go scuba diving in Southern Thailand or Mark could
go by himself on an elephant trek in Northern Thailand and Alex and Jennifer could
meet him later in Bangkok Mark chose the elephant trek and he had an exciting time
Amy was also having a good time back home sometimes she went out with her
friends at night and sometimes her mother would visit her during the day she also
liked to spend time by herself practicing her piano Mark and Amy learned that they
could spent their vacations separately yet they both could have a good time
2) Transitions
Notice in the examples below that the transition word “therefore” can have either a
semi-colon or a period before it, but that it also has a comma after it. Transition
words almost always have punctuation both before and after them.
Clause Transition Clause
Governments need money to
operate
; therefore, they require us to pay taxes.
Governments need money to
operate
. Therefore, they require us to pay taxes.
Because so many transition words and phrases exist, only frequently used transition
words and phrases are listed on the next page:

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Transitions Examples
for example
for instance
to illustrate
Dogs are very useful animals; for instance, they
can help the police find suspects.
also
in addition
besides
Students can learn to study more effectively by
following realistic study schedules. Also, they
can improve their textbook reading and note
taking skills.
that is
in other words
in fact
actually
Universities require transcripts; that is, they want
records of your grades from previous schools you
went to.
Caffeine does not always wake you up; in fact, it
can slow your responses down.
similarly
in the same way
My brother has a great sense of humour; in the
same way, my father loves a good joke.
in contrast
however
on the other hand
instead
otherwise
Vancouver winters are usually rainy and dark; in
contrast, Edmonton winters tend to be cold and
bright.
nevertheless
even so
admittedly
Mike knows he needs more sleep; nevertheless,
he stays up late every night playing computer
games.
as a result
therefore
consequently
thus
The drunk driver crashed into a police car; as a
result, he spent the night in jail and lost his
driver’s license.
previously
next
later
after that
first, second,
since then
finally
First, he phoned his lawyer; later, he reported the
accident to police.

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Exercise 3:
Use transitions from the list above to combine the following groups of ideas. Use
correct punctuation.
1) Marjorie is turning fifty this weekend.
She says that she feels like a twenty-one year old.
2) Jimmy and Kevin spend most of their time playing hockey.
They are excellent players.
3) You could take a bus.
My father could drive you.
4) The garden tools should not be left outside.
They will rust.
Some, but not all, transitions can be moved to other places in a sentence; however,
the punctuation rules change when you move the transition. Compare the following
examples:
Vancouver winters are usually rainy and dark; however, Edmonton winters tend
to be cold and bright.
Vancouver winters are usually rainy and dark; Edmonton winters, however,
tend to be cold and bright.
The rule is simple. If you place the transition somewhere in the middle of a clause
rather than at the beginning of the clause, you still need to include punctuation on both
sides of it (a comma in front of it and after it).

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Exercise 4:
Rewrite the following sentences by moving each transition several words later in the
second clause to a place where the transition still sounds good. Make sure you change
the punctuation as well. Check your changes with a tutor to make sure your revision
works.
1) The economy is strong. Therefore, interest rates tend to be high.
2) Everybody at the party saw the stranger. However, no one asked who he was.
3) You could finish your degree next year. On the other hand, you could choose
to work instead.
4) Agriculture contributes to greenhouse gases. For example, farm animals and
rice fields add a great deal of methane gas to the atmosphere.
3) Subordinators (Adverb Clauses)
There are two important differences between subordinators (below) and most other
connecting words (above):
1) when you put a subordinator between two clauses to connect them, you
should not use any punctuation.
2) when you put the subordinator at the beginning of a clause to introduce the
main clause, you need to put a comma between the two clauses.
Clause Subordinator Clause
He did his homework before he turned on the TV.
Before he turned on the TV, he did his homework.

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Because there are many subordinators in English, only frequently used subordinating
words are listed below:
Subordinator Examples
while
whereas
While Douglas offers only the first two years of
university courses, Kwantlen offers complete
four year programs.
as
just as
Just as organisms compete for resources in an
ecosystem, businesses compete for consumers
in a market.
before
after
when
whenever
while
until
since
as
as soon as
She was listening to the radio when the phone
rang.
Whenever the fire alarm sounds, students must
leave their classes to stand outside of the
building.
because
since
as
She’s taking psychology courses because she’s
curious about human behaviour.
though
although
even though
Even though Cathy works hard in that course,
she still isn’t getting good grades.
so+adjective+that
such+noun+that
She was so tired that she went to bed at 8
o’clock.
He was such a good doctor that she told her
friends about him.
if
only if
even if
as long as
unless
when
whenever
If you need help with one of your courses, you
can make an appointment with a tutor in the
Learning Centre.
We’ll have a picnic at Queens Park unless it
rains.

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Exercise 5:
Join the following ideas using the suggested subordinators. Write each sentence in two
ways, first using the subordinators between the two ideas and then rewriting each
sentence by placing the subordinator at the beginning of the two clauses.
1) because BC has a strong service industry
it is a favourite destination for tourists
a)
b)
2) even though my car is old and rusty
it takes me where I want to go
a)
b)
4) Prepositional Phrases that join ideas
Many times, a writer does not need a complete clause (subject + verb) to connect one
idea to another. Sometimes, small words called prepositions make it possible to
simplify the statement. Compare the following two sentences. Look at how the
preposition of works in the second sentence.
Because the test was scheduled for the next day, James stayed home to study.
Because of the test the next day, James stayed home to study.
Whenever a preposition is used to help join two parts of a sentence, the preposition is
never followed by a verb. Look at the following connecting prepositions to see more
examples of how verbs cannot be used after prepositions.
Prepositional
Connectors
Examples
due to
because of
We didn’t go camping because of the rain.
in spite of
despite
In spite of the rain, we went camping.

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In the following examples, you can see that prepositional phrase connectors use the
same punctuation rules as subordinators.
a) Do not use any punctuation when a prepositional phrase connector is in the
middle of sentence.
Margaret couldn’t call her husband on her cell phone because of a dead
battery.
b) Use a comma after the end of the prepositional phrase if the sentence begins
with the phrase:
Because of a dead battery, Margaret couldn’t call her husband on her cell
phone.
Exercise 6:
Join the following ideas using the suggested preposition phrases. Write each sentence
in two ways, first using the connectors between the two ideas and then rewriting each
sentence by placing the connectors at the beginning.
1) because of many people have jobs
BC’s strong service industry
a)
b)
2) In spite of my car takes me where I want to go
its age and rust
a)
b)

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Practice what you have learned about punctuating connecting words by adding correct
punctuation to the following paragraph:
Exercise 7:
Although new technology creates new kinds of jobs new technology also usually
makes many existing jobs disappear for example when trains started to be used as a
primary form of transportation many jobs that depended on horses and oxen started
to disappear later automobiles became the major form of transportation as a result
railroad companies could no longer keep as many people employed another new kind
of technology that is leading to job loss is the digital camera companies that make
film are laying off workers because so many consumers are switching from cameras
that use film to cameras that take digital photographs in the same way cell phones
make public pay phones less profitable so telephone companies no longer need to
employ as many technicians to install and maintain pay phones while it is true that
technological change can produce new wealth and new jobs new inventions also tend
to lead to the loss of jobs
For more practice with punctuating connecting words, see:
Azar, B. (1999). Understanding and Using English grammar (3d Edition). Toronto:
Prentice Hall Regents. Chapters 16, 17, 19.
Benson, B. and Byrd, P. (1989). Improving the grammar of written English: The editing
process. Boston: Heinle and Heinle. pp. 49-74.

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Douglas College Learning Centre
PUNCTUATION FOR CONNECTING WORDS – ANSWER KEY
1) Co-ordinating Conjuctions
Exercise 1:
1) Carlos lives in Canada, but he was born in Peru.
2) The car ran out of gas, so Bob had to walk two kilometers to find a gas station.
3) Maria could go to art school in New York, or she could stay in Vancouver to
look for a job.
4) Penelope likes to drive fast, but she got too many speeding tickets, so she lost
her driver’s license.
Exercise 2:
Mark loves to travel, but Amy doesn’t, so they often argue about where to spend
their vacation time. One summer, they decided to try something different. Mark went
to Thailand, but Amy stayed home. Mark’s brother, Alex, and sister-in-law, Jennifer,
went with him. They knew that they could only spend one week in Thailand, so they
had to decide what to do. They could all go scuba diving in Southern Thailand, or
Mark could go by himself on an elephant trek in Northern Thailand, and Alex and
Jennifer could meet him later in Bangkok. Mark chose the elephant trek, and he had
an exciting time. Amy was also having a good time back home. Sometimes she went
out with her friends at night, and sometimes her mother would visit her during the day.
She also liked to spend time by herself practicing her piano. Mark and Amy learned
that they could spent their vacations separately, yet they both could have a good time

13
2) Transitions
Exercise 3:
1) Marjorie is turning fifty this weekend. However, she says that she feels like a
twenty-one year old.
2) Jimmy and Kevin spend most of their time playing hockey. As a result, they
are excellent players.
3) You could take a bus. On the other hand, my father could drive you.
4) The garden tools should not be left outside. Otherwise, they will rust
Exercise 4:
1) The economy is strong. Interest rates, therefore, tend to be high.
2) Everybody at the party saw the stranger. No one, however, asked who he
was.
3) You could finish your degree next year. You could, on the other hand, choose
to work instead.
4) Agriculture contributes to greenhouse gases. Farm animals and rice fields, for
example, add a great deal of methane gas to the atmosphere.
4) Subordinators
Exercise 5:
1) because
a) Because BC has a strong service industry, it is a favorite destination for tourists.
b) BC is a favourite destination for tourists because it has a strong service industry.
2) Even though
a) Even though my car is old and rusty, it takes me where I want to go.
b) My car takes me where I want to go even though it is old and rusty.

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4) Prepositional Phrases
Exercise 6:
1) because of
a) Many people have jobs because of BC’s strong service industry.
b) Because of BC’s strong service industry, many people have jobs.
2) In spite of
a) My car takes me where I want to go in spite of its age and rust.
b) In spite of its age and rust, my car takes me where I want to go.
Exercise 7:
Although new technology creates new kinds of jobs, new technology also usually
makes many existing jobs disappear. For example, when trains started to be used as a
primary form of transportation, many jobs that depended on horses and oxen started to
disappear. Later, automobiles became the major form of transportation; as a result,
railroad companies could no longer keep as many people employed. Another new kind
of technology that is leading to job loss is the digital camera. Companies that make film
are laying off workers because so many consumers are switching from cameras that
use film to cameras that take digital photographs. In the same way, cell phones make
public pay phones less profitable, so telephone companies no longer need to employ as
many technicians to install and maintain pay phones. While it is true that technological
change can produce new wealth and new jobs, new inventions also tend to lead to the
loss of jobs.

15
Exercise 7:
Although new technology creates new kinds of jobs, new technology also usually
makes many existing jobs disappear. For example, when trains started to be used as
a primary form of transportation, many jobs that depended on horses and oxen
started to disappear. Later, automobiles became the major form of transportation.
As a result, railroad companies could no longer keep as many people employed.
Another new kind of technology that is leading to job loss is the digital camera.
Companies that make film are laying off workers because so many consumers are
switching from cameras that use film to cameras that take digital photographs. In the
same way, cell phones make public pay phones less profitable, so telephone
companies no longer need to employ as many technicians to install and maintain pay
phones. While it is true that technological change can produce new wealth and new
jobs, new inventions also tend to lead to the loss of jobs.

Punctuation for connecting words

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