* Plural:
* Them: (object pronoun) "I saw them at the park."
* Those: (demonstrative pronoun) "Those are my shoes."
* The people: "The people in the room were quiet."
* The ones: "The ones who left early missed the show."
* Singular:
* He/She/It: (depending on gender) "They went to the store." (used to refer to a person whose gender is unknown or not specified)
* That person: "That person said they were coming."
* Someone: "Someone said they saw a UFO."
To give you a better answer, please provide me with the sentence where you want to replace "they".