Final answer:
To create a compound sentence from a simple one, another independent clause must be added. The subject in sentences and clauses is the performer of the action.
Step-by-step explanation:
To change the simple sentence into a compound sentence, we can add another independent clause. For example, let's enhance sentence B: I ran to Usher when he sang his hit song, and I shouted his name loudly in the crowd. In this compound sentence, 'I ran to Usher when he sang his hit song' is the independent clause and 'when he sang his hit song' is the dependent clause because it cannot stand alone as a sentence. The 'and' joins the two independent clauses 'I shouted his name loudly in the crowd'.
In order to identify the subject in a sentence or clause, we look at who or what is performing the action. For instance, 'Who is going to the concert?' has the subject 'Who', while 'Give the tickets to whoever can use them' features 'whoever' as the subject of the clause. 'She is the person who is best qualified for the job' and 'She is the person who I think is best qualified for the job' both have 'who' and 'she' as subjects in the clauses.
Understanding complex sentences is essential since a complex sentence has one independent clause and one or more dependent clauses. An example is 'I let my neighbor borrow my phone because she said hers was tapped by the police', where the main clause is 'I let my neighbor borrow my phone' and the dependent clause is 'because she said hers was tapped by the police'.
In compound-complex sentences, there must be two or more main clauses and one or more dependent clauses. These sentence structures are useful for expressing multiple ideas in a single sentence.