Final answer:
Understanding the sentence structure, such as identifying the subject, verb, and object, is essential in English grammar. The subject is the person or entity that performs the action of dropping an article, which may not always be directly stated.
Step-by-step explanation:
When analyzing a sentence where an article is dropped, it is important to identify the subject, verb, and object to understand the grammar and structural elements of the sentence. For example, in the sentence 'Robert dropped the ball during the final seconds of the game,' 'Robert' is the subject, 'dropped' is the verb, and 'ball' is the object. This knowledge is crucial when studying English grammar and composition. Similarly, when we say an article has been dropped on the floor, the subject in this instance would be the person or entity that caused the article to drop, even though they may not be explicitly mentioned in the sentence. Contextual clues within a text or sentence can often help identify the subject responsible for the action.