Here's why:
* Simple predicate: This refers to the verb in a sentence, along with any modifiers or complements that directly relate to the verb. It's the part of the sentence that tells us what the subject does, is, or has.
* "Is" is only a verb; it doesn't include any other words that would make it a full simple predicate.
Example:
* Sentence: The cat is sleeping.
* Simple predicate: is sleeping (verb + modifier)
* Verb: is
To identify a simple predicate, look for the verb and any words that directly describe the action, state of being, or occurrence.