Final answer:
The sentence 'Aidan went to the library and the grocery store.' is a simple sentence as it contains only one independent clause with one subject and one predicate.
Step-by-step explanation:
The sentence 'Aidan went to the library and the grocery store.' is a simple sentence despite the use of the conjunction 'and.'
This is because the sentence contains only one subject ('Aidan') and one predicate ('went to the library and the grocery store'), making the entire sentence a single main clause that can stand alone and express a complete thought.
The presence of the conjunction 'and' in this case does not create a second independent clause, but rather joins two objects of the same verb, thereby maintaining the sentence as a simple sentence.
Compound sentences, on the other hand, are comprised of two or more main clauses that are equally important and can stand alone as sentences. They often use coordinating conjunctions, such as 'for,' 'and,' 'nor,' 'but,' 'or,' 'yet,' and 'so' (fanboys), to join these clauses.