* She is going to the store.
* He is playing basketball.
* I am going to school.
* You are a good friend.
* We are going to the movies.
* They are eating dinner.
* It is raining outside.
In these examples, the subject pronouns ("she", "he", "I", "you", "we", "they", "it") are performing the action of the verb. They are the ones who are going, playing, eating, etc.