Verified answer

The third sentence.

Fish = subject

The and 'in that pond' = modifiers of fish

Look = predicate

Huge = predicate adjective, modifying fish

I'm not sure if any do, but to help you:

A predicate adjective is an adjective following a linking verb, that describes the subject. However, I think a few words can be in between the linking verb and the adjective. In is a linking verb, and it's used in many of your sentences.

I think it's the third. Fish is a noun used as the subject. In is a linking verb, pond is a noun, and huge is the adjective following a linking verb that describes the subject, fish.

Nah!! I beoive the other two are wrong. . .predicate means the part of the sentence that is not the subject, or the verb.

Therefore the third sentence is the one with the pred adj.

The fish - subject

in that pond - prepositional phrase (and part of the predicate too)

huge - the part of the predicate that describes 'fish'

Tell me if I am wrong. . .

The first one. "Huge" is an adjectivial modifier of the noun, "circles." The subject of the sentence is fish. The verb is "are swimming."

The first one!