Greeting: "Hi, Eric. How are things going?" Request

For example:

- A warning: "I warn yo to stop smoking!"

It constitutes an expressed locutionary act because its propositional content predicates a future act (to stop smoking) to the hearer (you)

Illocutionary act is the real action which is performed by the utterance. It is semantic "illocutionary force" of the utterance, thus the real, intending meaning. In performing a illocutionary act, it can be performed such an act as:

• 
  Warning
  

In saying, "Watch out, the ground is slippery", Mary performs the speech act of warning Peter to be careful.