Suppose I tell you that my cat is hungry. There are four distinct entities, each participating in, and contributing to this simple linguistic event. First, there is the sentence uttered, namely, the declarative “my cat is hungry”. Second, there is the preposition expressed by the sentence (or rather by it’s utterance). Third, there is the belief that I am trying to convey. Finally, there is the speech act that ties everything together, namely, the speech act of asserting that my cat is hungry.