1.them as the direct object
In a sentence, "they" can be used as the direct object of the verb, indicating the receiver or the action object. For example: "I gave them the books" (I gave them those books), "She loves them very much" (she loves them very much).
2. They are used as indirect objects
They can also be used as indirect objects of verbs, meaning to give or pass on to someone or some people. For example, "He gave them gifts" and "Please show them the way" (please show them the way).
3. They are reflexive pronouns
They can be used as reflexive pronouns, indicating that the performer and receiver of the action are the same person or a group of people. For example, "They help them with food." (They helped themselves to food), "We should take care of ourselves." We should take care of ourselves.
4.4. Their other uses
Besides being objects and reflexive pronouns, "they" can also be subjects, objects or indirect objects in relative pronoun clauses. For example, "I saw those people and I talked to them." (I saw those people and talked to them) "The book I lent them was very interesting." The books I lent them are very interesting. ).
Summary:
They are common pronouns in English, referring to people or things in the plural. You can be a direct object, an indirect object, a reflexive pronoun and a subject, an object or an indirect object in a relative clause. When using, we should pay attention to the requirements of context and verbs to ensure the accurate expression of the referred object, and we can substitute other pronouns or noun phrases as needed.