Here's a breakdown:
* Subject: The noun performing the action.
* Verb: The action word.
* Nominative Case: The grammatical form of the noun when it's the subject.
Example:
* The cat (subject - nominative case) chased (verb) the mouse.
In this sentence, "cat" is the subject, performing the action of "chasing." Since it's the subject, it's in the nominative case.
Key points about the nominative case:
* It's used for subjects, which are the actors in a sentence.
* English doesn't have a lot of grammatical case markings, so we primarily identify the nominative case through its function as the subject.
* It's important to distinguish between nominative and accusative case, where the noun is the object of the verb (receiving the action).
Let me know if you'd like more examples or have other questions about the nominative case!