in which sentence below is the underlined word a predicate nominative?

carmen is very interested in science, especially biology and anatomy
carmen plans to pursure a career as a doctor
carmen is a volunteer at the local hospital

The underlined word "volunteer" is a predicate nominative in the sentence "Carmen is a volunteer at the local hospital."

The sentence "Carmen is a volunteer at the local hospital" contains the underlined word "volunteer," which is a predicate nominative.

To determine which sentence below has an underlined word as a predicate nominative, we first need to understand what a predicate nominative is.

A predicate nominative is a noun or a pronoun that follows a linking verb and renames or identifies the subject of the sentence.

Now, let's analyze the given sentences:

1. Carmen is very interested in science, especially biology and anatomy.
In this sentence, the underlined word "science" is not a predicate nominative. It is the direct object of the verb "interested."

2. Carmen plans to pursue a career as a doctor.
Here, the underlined word "doctor" is not a predicate nominative either. It is the object of the preposition "as" and functions as a noun phrase.

3. Carmen is a volunteer at the local hospital.
In this sentence, the underlined word "volunteer" acts as a predicate nominative. It renames or identifies the subject "Carmen," who is being described as a "volunteer."

Therefore, the sentence that contains the underlined word as a predicate nominative is: "Carmen is a volunteer at the local hospital."