Object of a preposition: support
Direct object: letter
Indirect object: John
The object of the preposition is the noun, noun phrase or pronoun that follows a preposition and completes its meaning. In this example, the preposition is "of," which means that the object of the preposition is the noun "support." In the case of the direct object, this refers to the noun that receives the action mentioned in the sentence, while the indirect object is the one for whom the action was performed.
