The subjunctive mood is a verb form used to express wishes, hypotheticals, or situations that are not real. It often appears in sentences that convey desires, suggestions, or conditions contrary to fact. For example, in the sentence "I wish that he were here," the verb "were" indicates a wish rather than a reality. In English, the subjunctive is most commonly found in specific phrases, such as "If I were you" or "It's essential that she be present." While less common in everyday conversation, it remains important in formal writing and speech to convey uncertainty or non-factual scenarios.