1. Subject: The subject is the person, place, thing, or idea that performs the action of the verb. It answers the question "who" or "what" is doing the action. For example, in the sentence "The dog barked," the subject is "the dog."
2. Verb: The verb is the action word or state of being in a sentence. It describes what the subject is doing or being. In the example "The dog barked," the verb is "barked."
3. Object: The object is the person, place, thing, or idea that receives the action of the verb. It answers the question "what" or "whom" the action is directed towards. In the sentence "The dog chased the ball," the object is "the ball."