A predicate nominative or predicate noun completes a linking verb and renames the subject. It is a complement or completerbecause it completes the verb. Predicate nominatives complete only linking verbs. The linking verbs include the following: the helping verbs is, am, are, was, were, be, being, and been; the sense verbs look, taste, smell, feel, and sound; and verbs like become, seem, appear, grow, continue, stay, and turn.
The verb in a sentence having a predicate nominative can always be replaced by the word equals. Examples: Mr. Johanson is a teacher. Mr. Johanson equals a teacher. Mr. Johanson is a father. Mr. Johanson equals a father. Mr. Johanson is my neighbor. Mr. Johanson equals my neighbor.
Predicate nominatives can be compound. Example: Mr. Johanson is a teacher, father, and my neighbor.
Instructions: Find the subjects, verbs, and predicate nominatives in these sentences. Some may have compound subjects, verbs, or predicate nominatives.
1. One traitor and enemy to his country was Benedict Arnold.
2. Two loved Presidents were Lincoln and Washington.
3. A ruby is a beautiful stone.
4. The roads in the mountains can be long dusty trails.
5. The location to the mine was and still is a secret.
–For answers scroll down.
1. traitor, enemy = subjects, was = verb, Benedict Arnold = predicate nominative
2. Presidents = subject, were = verb, Lincoln, Washington = predicate nominatives
3. ruby = subject, is = verb, stone = predicate nominative
4. roads = subject, can be = verb, trails = predicate nominatives
5. location = subject, was, is = verbs, secret = predicate nominatives
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from Daily Grammar Lessons Blog http://dailygrammarlessons.blogspot.com/2017/01/lesson-103-parts-of-sentence-predicate.html