Explanations:Conjunctions are words that connect words, phrases, or clauses. They are essential in forming complex sentences and conveying relationships between different parts of a sentence. Conjunctions of contrast, such as "but," "however," and "although," are used to show that the second clause expresses an idea that is different from or opposite to the first clause.
In the given sentences, "I like to play basketball" and "My brother does not," the second sentence expresses an idea that is in contrast to the first. Therefore, a conjunction of contrast is needed to connect these two clauses. The conjunction "but" is the most appropriate choice here because it clearly indicates that the second clause is contrasting with the first.
When using a conjunction to connect two independent clauses, a comma is required before the conjunction. An independent clause is a clause that can stand alone as a complete sentence. In this case, both "I like to play basketball" and "My brother does not" are independent clauses. Therefore, a comma is necessary before the conjunction "but" to properly separate the two clauses.
Option C, "I like to play basketball, but my brother does not," is the correct answer because it uses the conjunction "but" to show the contrast between the two clauses and includes the necessary comma before the conjunction. This structure ensures that the sentence is grammatically correct and clearly conveys the contrasting ideas.
It is important to note that conjunctions of contrast are not interchangeable with other types of conjunctions, such as coordinating conjunctions like "and" or "or." These conjunctions are used to connect ideas that are similar or additional, not opposing ones. Therefore, using "and" in this context would be incorrect, as it does not convey the necessary contrast between the two clauses.
Additionally, when combining two independent clauses, a conjunction alone is not sufficient. A comma is required before the conjunction to properly separate the clauses. This rule applies to all coordinating conjunctions, including "but," "and," "or," "nor," "for," "so," and "yet." Failing to include the comma can result in a run-on sentence, which is grammatically incorrect.
In summary, the correct way to combine the sentences "I like to play basketball" and "My brother does not" is to use the conjunction "but" and include a comma before it. This structure clearly shows the contrast between the two clauses and adheres to the rules of proper sentence construction.