Unlike the indicative mood, the subjunctive mood often appears in subordinate clauses. Also known as dependent clauses, subordinate clauses contain both a subject and a predicate but cannot function as complete sentences. Many of the verb phrases in the subjunctive mood in the previous examples begin with the subordinating conjunction if. Noun clauses that begin with if are often referred to as if clauses. The subjunctive mood in English most frequently appears in if clauses because such clauses always express possibility, necessity, and contingency. For example, in the sentence If the driveway were being resealed, then I would park on the road, my parking on the road is contingent upon the driveway being resealed.
However, not all dependent clauses that express possibility, necessity, and contingency begin with the subordinating conjunction if. For example, the boy not failing the test was contingent on his studying as expressed in the sentence Had the boy been studying as he said, he would not have failed the test. The noun clause Had the boy been studying as he said is a subordinate clause that contains the subjunctive mood. This noun clause could also be written as If the boy had been studying as he said with an if introducing the clause. However, in English, the if of the if clause can be removed so long as the first auxiliary verb switches places with the subject. Therefore, the if clause If the driveway were being resealed could also be written as Were the driveway being resealed without eliminating the subjunctive mood.
The subjunctive mood also appears in a verb phrase following a modal verb.
Please continue reading on page two for more information on the use of the subjunctive mood in English.