Which term expresses a complete thought and can stand alone as a sentence?

• A. Subordinate clause
• B. Prepositional phrase
• C. Direct object
• D. Independent clause

Answer: (D)

A sentence that can stand alone expresses a complete thought, and that happens in an independent clause. An independent clause has both a subject and a predicate and makes sense by itself, like “She writes daily.” Here the subject is She and the predicate is writes daily, and the thought is complete without needing extra information.

A subordinate clause, by contrast, has a subject and a verb but does not express a complete thought on its own. It leaves the reader waiting for more information, as in “Although she tried,” which needs an independent clause to finish the idea.

A prepositional phrase—such as “in the park” or “after the movie”—lacks a subject-verb structure and cannot form a complete sentence by itself.

A direct object is a noun or noun phrase that receives the action of a verb, like “the ball” in “kicked the ball.” It cannot stand alone as a sentence because it depends on a verb to complete the thought.

So, the term that best fits a complete thought that can stand alone is the independent clause.