4. Topic Sentence In this study, a topic sentence refers to a general sentence which becomes
the center of the paragraph in which the other sentences in the paragraph are developed to explain this sentence and to make it more vivid Moore, 1955.
5. Supporting Sentences In this study, supporting sentences are sentences that develop the topic
sentence by giving reasons, examples, and facts Muhyidin, 1988. 6. Writing Competency
In this study, competency, or in the basic form competence, means that the students have the necessary ability, authority, skill, knowledge, etc in writing a
topic sentence and supporting sentences correctly in a good paragraph composition. Thus, the items which will be measured in this study are the
students’ competency in writing a topic sentence, supporting sentence and the grammar and coherence to support a good writing composition Hornby, 1995.
CHAPTER 2 THEORETICAL REVIEW
This chapter will discuss the theories which underlie the study. This chapter will be divided into two parts: theoretical description and theoretical framework. The
theoretical description consists of brief descriptions of the theories which are used in this study. The theoretical description will discuss four major theories: first, writing,
which will discuss the theory of writing in general. Second, paragraph which will elaborate paragraph and its substances. The third is argumentative writing which will
discuss about the theories of argumentative writing and argumentative paragraph. And the last is testing writing which will elaborate the theories which support the
way the researcher gathers the data of this study. In the theoretical framework, the writer will adapt the theories from the theoretical description to support this study.
2.1. THEORETICAL DESCRIPTION
2.1.1. WRITING
As mentioned in the first chapter, writing means both physical and mental work. Writing is a physical work of gathering words into sentence, sentences into
paragraph, and paragraphs into text. However, the physical work of writing will not be meaningful without the mental work. The mental work of writing here is
the work of brain in investing ideas, thinking about how to express them, and organizing them into statements and paragraph, so that the physical work of
