Can you give me an example of a complete subject and a complete predicate in the same sentence?

It is impossible to form a sentence without a complete subject and a complete predicate. Those are the two required constituent parts of any sentence. The subject is the simple subject and any of its associated parts, such as adjectives, and the predicate is the verb and any of its associated parts, such as adverbs and predicate objects.

The shortest possible sentence in the English language is, "I am." The subject is "I" and the predicate is "am."