* Adjectives: These describe the indirect object. For example: "She gave him a warm smile." (The adjective "warm" modifies the indirect object "him")
* Adverbs: These describe how the indirect object is affected by the verb. For example: "She sent me a letter quickly." (The adverb "quickly" modifies the indirect object "me")
* Prepositional phrases: These can provide more information about the indirect object. For example: "He gave the book to her." (The prepositional phrase "to her" modifies the indirect object "her")
* Clauses: These can provide further details about the indirect object. For example: "She told the man who was standing by the door that she would be back soon." (The clause "who was standing by the door" modifies the indirect object "the man")
It's important to note that indirect objects are usually nouns or pronouns, and they receive the direct impact of the verb, even if indirectly.