Sp2: Ser y Estar con Adjectivos If the adjective is a condition that is more or less permanent, that is, not likely to change back and forth, use ES (ser). If it is basically likely to be non-permanent, that is, lilkely to change back and forth, use ESTÁ (estar). Tools See a list of terms used in this activity. Activity created by: Kathleen Pepin This activity was created by a Quia Web subscriber. To learn how to make your own, just like this, click here.