In one room we saw several unusual computers. Would the complete redicate be unusual computers and the verb unusual

Nope.

You missed the verb. Remember it shows action or tells what someone or something did.

In this sentence the verb is the first word of the complete predicate.

In your sentence, the phrase "several unusual computers" serves as the direct object of the verb "saw." The term "unusual" is an adjective describing the computers. To determine whether "unusual" is an adjective or a verb, we can consider its function in the sentence.

To identify the word class of "unusual," we can follow these steps:
1. Check if "unusual" modifies a noun: In this sentence, "unusual" modifies the noun "computers." It describes the nature of the computers, suggesting that they are not ordinary or typical.
2. Identify if "unusual" can be inflected or transformed into different forms: In this case, "unusual" cannot be conjugated or transformed into different verb tenses, indicating that it is not a verb.
3. Verify if "unusual" can take an adverb to modify it: "Unusually" is the adverb form, such as in "The computers were unusually fast." However, in your sentence, "unusual" does not have an adverb modifying it.

Based on these observations, "unusual" is an adjective modifying the noun "computers." Therefore, it is serving as an attributive adjective in your sentence.