My Ford Escort is the worst car I ve ever had. A main idea must contain specific words. The Green party uses nonviolent tactics to protest political injustice. A main idea cannot be too narrow or too broad. My car is a Ford Escort.
Many people have problems with their cars.
About the different types of banks. This is about the different types of banks. too narrow The main idea is the different types of banks. too broad The main idea is banks. An outline is an orderly arrangement of related ideas, a guide to the information in a selection. An outline is organized from general to specific , from subject to main ideas to supporting details. Write in phrases , not sentences.