Reading Comprehension Success in 20 Minutes a Day, 3rd Edition

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F I N D I N G T H E M A I N I D E A
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2 9

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Practice 3
Among the following eight sentences are 
two
topics
sentences. The other sentences are supporting sen-
tences. Circle the two topic sentences. Then write the
numbers of the supporting sentences that go with each
topic sentence.
1.
Finally, there is a concierge on duty 24 hours a day.
2.
Some police offer duties, like writing reports,
have no risk at all.
3.
For example, there is a pool on the top floor.
4.
Not all police duties are dangerous.
5.
Others, like traffic duty, put police officers at very
little risk.
6.
Tenants of the luxury apartment building enjoy
many amenities.
7.
Still other duties, like investigating accidents,
leave officers free of danger.
8.
In addition, the lobby has a dry cleaner, an ATM
machine, and a coffee shop.
Sentences 4 and 6 are the two topic sentences
because both make an assertion about a general subject.
The supporting sentences for topic sentence 4, “Not all
police duties are dangerous,” are sentences 2, 5, and 7.
The supporting sentences for topic sentence 6, “Tenants
of the luxury apartment building enjoy many ameni-
ties,” are the remaining sentences 1, 3, and 8.
Here’s how they look as paragraphs:
Not all police duties are dangerous. Some duties, like
writing reports, have no risk at all. Others, like traf-
fic duty, offer very little risk. Still other duties, like
investigating accidents, leave officers free of danger.
Tenants of the luxury apartment building enjoy
many amenities. For example, there is a pool on the
top floor. In addition, the lobby has a dry cleaner, an
ATM machine, and a coffee shop. Finally, there is a
concierge on duty 24 hours a day.
You might have noticed the supporting sentences
in the first paragraph about police duties begin with the
following words:
some, others,
and
still other
. These
words are often used to introduce examples. The sec-
ond paragraph uses different words, but they have the
same function:
for example, in addition,
and 
finally.
If
a sentence begins with such a word or phrase, that is a
good indication it is 
not
a topic sentence—because it is
providing a specific example.
Here are some words and phrases often used to
introduce specific examples:
If you’re having trouble finding the main idea of
a paragraph, you might try eliminating the sentences
that you know contain supporting evidence.
S u m m a r y
Now you can answer the last question—the 
why
. What
is the writer’s motive? What’s the main idea he or she
wants to convey? By finding the sentence that makes an
assertion about the subject of the paragraph and that
encompasses the other sentences in the paragraph, you
can uncover the author’s motive.
For example
For instance
In addition
Furthermore
In particular
Some
Others