What is the predicate adjective in sentence When you first met him John was quite immature.?

The predicate adjective in the sentence "When you first met him John was quite immature" is immature.

Here's why:

* Predicate Adjective: A predicate adjective modifies the subject of the sentence and follows a linking verb.

* Linking Verb: In this case, the linking verb is "was". It connects the subject "John" to the description "immature".

* Subject: The subject is "John".

* Modification: The word "immature" describes the subject "John" and tells us something about his state.

Therefore, "immature" is the predicate adjective because it modifies the subject "John" and follows the linking verb "was".