The document discusses the difference between a thesis sentence and a topic sentence. A thesis sentence conveys the central idea of a composition and indicates how it will be supported, while a topic sentence guides only one paragraph. The thesis sentence generally appears at the beginning of the composition and gives the overall plan. It can be a statement of position, belief, or point of view. Dividing the thesis sentence into two or three parts provides more structure and support. Expository and argumentative compositions require a thesis sentence, while narrative and descriptive compositions may not.

1. Thesis Statement and Topic Sentence
What is a thesis sentence?
It conveys the central or main idea of the composition and indicates how the
main idea will be supported.
What is the difference between a thesis sentence and a topic sentence?
• A thesis sentence governs the content and structure of a whole composition,
whereas a topic sentence guides only one of its parts or paragraphs.
• The thesis sentence plans the trip, as it were; the topic sentence shows one
of the places that must be passed through to get to the destination.
Where should the thesis sentence be placed within the composition?
• Generally at the beginning of the composition
• May be the first and only sentence of the first paragraph
• May follow an introductory sentence or two and then come as the climax of the
first paragraph
Are all thesis sentences alike in content and form?
• A thesis sentence is a statement of position, of belief, or of a point of
view, either your own or that of someone else, such as the author of your
assigned reading.
• Much like a good outline, a thesis sentence gives the plan for the
composition.
Divide the thesis sentence into two or three parts.
• People who live in the suburbs are alike. (Undivided)
• People who live in the suburbs are alike in age, race, and politics.
(Divided into three parts)
• Capital punishment should be abolished. (Undivided)
Capital punishment should be abolished because it is useless and inhumane.
(Divided into two parts)
• The essay is a satire. (Undivided)
The essay satirizes younger as well as older people. (Divided into two
parts)
Life on this earth may soon be wiped out. (Undivided)
Plants, animals, and people (the so-called higher animals) may soon be wiped
out. (Divided into three parts)
• The second sentence of each pair above is a brief summary that tells not only
where the composition is going but also how it is going to get there.
• The composition must discuss each part of the thesis in the order in which it
appears in the thesis.
The division is for the purpose of supporting the thought or providing proof.
• It may rain today. (Unsupported)
o It may rain today because there are dark clouds in the sky and my
barometer is falling. (Supported)
• Mr. X thinks he has a cold or the flu. (Unsupported)
o Mr. X thinks he has a cold or the flu because he has a sore throat, a
headache, and a fever. (Supported)
• Communication between black people and white people is often very poor.
(Unsupported)

2. Thesis Statement and Topic Sentence
o Communication between black people and white people is often very
poor for two reasons: they live in different worlds and they speak
different languages. (Supported)
Do compositions always contain a thesis sentence?
• Expository and argumentative compositions require a thesis sentence.
• Narrative and descriptive compositions may not require one.
Is the thesis always a single sentence?
• In some cases it may be simpler or clearer to break the thesis down into more
than a single sentence, especially if the main idea of the composition is
unusually complex or if the composition is long.
• Is the division of the thesis sentence always limited to two or three parts or
supports?
In a short composition of about four to eight paragraphs, plan to limit
the parts or supports of the main idea to two or three.
Practicing the Thesis Sentence
• The most common form of the supported thesis sentence first states the subject
and then states the supports.
• The supports are often introduced by words or expressions such as the
following:
-because -since -as -due to -by -in -in that
• A punctuation mark, the colon (:), may substitute for these words and serve
the same purpose.
Examples
• Deems Taylor calls Richard Wagner a monster because Wagner was conceited,
unstable, and selfish.
• Christmas is an exhausting experience due to the extra energy and tension
it inspires.
• The profession of law demands three important qualities of mind: the
ability to analyze ideas, an interest in people, and patience with
details.
Exercises-
Try to develop these unsupported thesis sentences into thesis sentences with two
or three supports.
1. The Surgeon General has determined that cigarette smoking is dangerous.
2. It makes sense to drive a compact car.
3. A career in nursing offers rewarding opportunities.
4. Writing a good composition can be an exhausting experience.
5. A good marriage depends upon three important qualities in a couple.
6. Daytime television dramas are emotionally draining.
7. Men as well as women suffer from sexual stereotypes.
8. Four years of high school were (not) of great value to me.
9. Being a good police officer demands three important qualities of mind.
10. It is dangerous to be living in this world today.
11. The Bible is a great book to study.
12. Tennis (football, baseball, etc.) is a challenging sport.
13. It is important to protect whales and other endangered species.
14. It makes sense to cook and eat at home.
15. A good vacation has three important ingredients.