Nominative
Definition 1 of 2
Pro Tip 1/3
Subject Identification
The nominative case identifies who or what performs the action in a sentence. In 'She sings beautifully', 'She' is nominative.
Pro Tip 2/3
Not for Objects
Nominative isn't used for the object receiving an action, that's the objective case. In 'The cat follows her', 'her' is not nominative.
Pro Tip 3/3
Nominative Pronouns
Nominative pronouns include I, you, he, she, it, we, they. 'We will go to the park', 'we' is a nominative pronoun.