A person with this type is easily distracted. 'A common symptom of ADHD is inattention. This excerpt from a student speech about Attention Deficit Hyperactivity Disorder shows how to use a brief example: They will illustrate your point quickly and effectively without digression. Brief Examplesīecause they are short (two to three sentences), they work well in shorter speeches. There are three types of examples that you can use. These are usually very easy to find in your research. Examples help explain, clarify, or illustrate what you are talking about.