1. Emphasizing a difference:
* The scientist's latest theory was considered an aberration, but it sparked a new wave of research in the field.
2. Highlighting a surprising event:
* The company's annual profits were significantly higher than expected, which was an aberration caused by a major product launch.
3. Contrasting normalcy with the unusual:
* The child's behavior was usually well-behaved, so this outburst was a complete aberration.
4. Focusing on a deviation from a standard:
* The athlete's performance was a huge aberration, far below his usual standards, but he attributed it to a recent injury.
5. Describing an exception to a rule:
* The recent drop in unemployment was an aberration; the overall trend shows a steady increase.
Remember: A compound sentence combines two or more independent clauses (clauses that can stand alone as sentences) using a coordinating conjunction (such as "but", "and", "or", "so", "yet"). The examples above follow this structure.