It is an expresion that has no sense by it self , it is used to enpahsize somethig taht you are gonna say. For example, if somebody ask you to do his job, you would say in Spanish: "aver ... es tu trabajo no el mio". Another example, if somebody try to teach you esperanto, you would say: Aver, dije que queria aprender español , no esperanto. There are some other ways to use it . Why dont we talk bye skype? my ID: surco2020 .