A topic sentence is composed of the main idea. Its the most important paragraph. The topic sentence generally is composed of two parts: (a) the topic itself and (b) the controlling idea.
The "topic sentence" is the sentence in which the main idea of the paragraph is stated. It is unquestionably the most important sentence in the paragraph. The topic sentence generally is composed of two parts: (a) the topic itself and (b) the controlling idea.
