write a sentence using a verb in the subjunctive mood and then explain how you recognize the use of the subjunctive mood

It is essential that he study for the exam tomorrow.

The use of the verb "study" in the sentence indicates the subjunctive mood because it expresses a hypothetical or desired action that may or may not actually happen. In this case, the sentence is emphasizing the importance of the action without indicating whether or not it will actually be carried out.