How can one determine the subject of a sentence?

To determine the subject of a sentence, one can ask who or what the sentence is about. This approach directly identifies the main focus of the sentence, which typically includes the doer of the action or the one being described. The subject usually answers the question posed by the reader about the key entity involved in the sentence, whether that be a person, place, thing, or idea.

While asking about the actions or identifying the main verb can provide context about the subject, it does not singularly focus on the subject's identity itself. Similarly, examining the length of the sentence does not offer any information about the subject, making that method ineffective in determining the sentence's focus. Therefore, asking who or what the sentence is about is the most precise and reliable method to identify the subject.