The compound sentence "I went to the store, and then I visited my friend" contains correct punctuation.
The difference between a compound sentence and a complex sentence is that a compound sentence has two independent clauses, connected by a Coordinator. A complex sentence on contains one independent clause. A complex sentence also always contains a subordinator.
The sentence contains a compound sentence.
A MIXED COMPOUND SUBJECT is a mixture of subjects in a sentence.
A compound sentence contains two or more independent clauses connected by a conjunction.
A compound sentence is a sentence that contains at least two complete sentences joined by a conjunction (and, but, or) or semicolon (;). The word its is a possessive pronoun. Any sentence that contains the word its can be made into a compound sentence by connecting another sentence to it correctly. "My dog's name is Rover and its fur is brown."
Compound sentence
This sentence is a simple sentence because it contains only one independent clause.
A sentence that contains two independent clauses joined by a coordinating conjunction.
The dog searched for its bone.
A compound sentence is a sentence that contains two independent clauses joined by a coordinating conjunction (such as "and," "but," or "or"). Each clause in a compound sentence could stand alone as a complete sentence.
The first sentence in A Tale of Two Cities is compound complex because it contains multiple independent clauses and at least one dependent clause.