Features of good paragraph in english
A paragraph is a collection of sentences which all relate to one main idea or topic. Effective paragraphs have four main characteristics: a topic sentence, unity, coherence, and adequate development. Each of these characteristics is discussed below.
Unity
Unity refers to the extent to which all of the ideas contained within a given paragraph "hang together" in a way that is easy for the reader to understand. When the writer changes to a new idea -- one which is not consistent with the topic sentence of the paragraph -- the writer should begin a new paragraph. Unity is important because it aids the reader in following along with the writer's ideas. The reader can expect that a given paragraph will deal only with one main topic; when a new paragraph begins, this signals that the writer is moving on to a new topic.Coherence
Coherence refers to the extent to which the flow of ideas in a paragraph is easily understood by the reader. For this reason, coherence is closely related to unity. When a writer changes main ideas or topics within a paragraph, confusion often results. To achieve coherence, then, a writer should show how all of the ideas contained in a paragraph are relevant to the main topic.
Adequate Development
A paragraph is adequately developed when it describes, explains and supports the topic sentence. If the "promise" of the topic sentence is not fulfilled, or if the reader is left with questions after reading the paragraph, the paragraph has not been adequately developed. Generally speaking, a paragraph which consists of only two or three sentences is under-developed. A good rule of thumb to follow is to make sure that a paragraph contains at least four sentences which explain and elaborate on the topic sentence.
Topic Sentences
Beginning a paragraph with a topic sentence is one of the best ways to achieve clarity and unity in one's writing. The function of a topic sentence is to describe what the paragraph will be about, such that the reader has clear expectations about what will follow. An effective topic sentence typically contains only one main idea. The remainder of the paragraph then develops that idea more fully, offering supporting points and examples. After reading a topic sentence, one should be able to anticipate the type of information contained in the rest of the paragraph. If the remainder of the paragraph does not fulfill the "promise" of the topic sentence, the paragraph will lack unity, coherence and adequate development.
