which sentence contains a predicate noun?
Hoover will lead the group hike on sunday
He plans to leave Lookout Point
He is an expert on the plants of the region
He tells hikers about animals too
To have a predicate noun in a sentence, you must also have a linking verb, not an action verb. So look at the verbs and decide which one is the linking verb:
will lead
plans
is
tells
http://grammar.ccc.commnet.edu/grammar/verbs.htm#linking
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The sentence that contains a predicate noun is:
"He is an expert on the plants of the region."
In this sentence, the linking verb is "is" and the predicate noun is "expert."
To identify a predicate noun, you need to look for a sentence that has a linking verb, such as "is," "are," "was," "were," "be," "being," or "been." The predicate noun is the noun that follows the linking verb and renames or identifies the subject of the sentence.