1. Noun:
* Definition: A person, place, thing, or idea.
* Example: "The object of her affection was her classmate." (The word "object" represents a person.)
2. Verb:
* Definition: To oppose something.
* Example: "She objected to the new policy."
3. Pronoun:
* Definition: A word that replaces a noun.
* Example: "The teacher asked the student about it. (The word "it" replaces a noun like "the book" or "the assignment".)
4. Adjective:
* Definition: A word that describes a noun.
* Example: "He had an object lesson in how to behave." (The word "object" describes the type of lesson.)
To determine the part of speech, you need to look at how the word is used in a sentence.