Topic Sentence
     
 
In the last lesson we read and understood the facts and information about the human body. It was an excellent paragraph describing the human body. Now, let us attempt writing such a paragraph. To write a paragraph we should first know what a paragraph is.
 
What is a paragraph?
It is a group of related sentences that develop one main idea. All sentences in a paragraph speak about one aspect of a topic and discuss one main subject. There are four basic types of paragraphs: 1) descriptive, 2) narrative, 3) persuasive, and 4) expository. We shall learn how to write a descriptive paragraph. The sentences in a paragraph are of three kinds.

Topic sentence, which states the main idea and is often presented as the first sentence, may also occur anywhere in a paragraph. It indicates the matter to be discussed in the paragraph and works as a summary of it. It also sets the tone for the organization of the supporting sentences that further explain the concept established by it.
Supporting sentences describe the topic sentence. These sentences support or explain the idea expressed in the topic sentence.

Concluding Sentence summarizes the information that has been presented and restates the main idea of the paragraph. It is presented at the end of the paragraph.

Supporting sentences describe the topic sentence. These sentences support or explain the idea expressed in the topic sentence.

Concluding Sentence summarizes the information that has been presented and restates the main idea of the paragraph. It is presented at the end of the paragraph.

Focusing the Topic sentence:
The Human Body
The human body is a wonderful piece of work that nature has created. It is not beautiful like the body of a butterfly or peacock but it is shaped practically. It can do many types of work which other animals cannot. It is not strong like the body of a tiger. But in place of physical strength it has a big and sharp brain. By using this brain the human physique has been able to overcome many of its limitations. By sitting in an aeroplane it flies faster than a kite, by riding a motorcycle it travels faster than a leopard, and by firing a machine gun it fights much better than a tiger. In spite of all this, the human body suffers from many diseases because it has a weakness for habits such as smoking, drinking and overeating. When it is healthy the body can give great pleasure but when it is sick it can cause great pain. The wise man would always keep his body fit because a healthy mind can work only in a healthy body.
 
The human body is a wonderful piece of work that nature has created.
By using this brain the human physique has been able to overcome many of its limitations.
But in place of physical strength it has a big and sharp brain.
The sentence in bold is the topic sentence because all the other senteces in the paragraph speak about the human body, its achievements and weaknesses and how they can be overcome.