Estar in present
Estoy estas esta estamos estais estan
Estar in imperfect
Estaba estabas estaba estabamos estabais estaban
Estar in future
Estare estara estaras estaremos estareis estaran
Estar in conditional
Estaria estarias estaria estariamos estariais estarian
Estar in preterit
Estuve estuviste estuvo estuvimos estuvisteis estuvieron
Present progressive is used for
Indicating that the action is happening at the moment of speaking, to describe an action that is different than normal regardless of whether or not it is in progress
Imperfect progressive is used for
Indicating the continuity of the action
Conditional is used for
Adding emotional impact to the narration of an action in progress