Present Tense
* yo estoy (I am)
* tú estás (you are)
* él/ella/usted está (he/she/formal you is)
* nosotros/nosotras estamos (we are)
* vosotros/vosotras estáis (you all are - informal)
* ellos/ellas/ustedes están (they/formal you all are)
Preterite Tense (Past Tense)
* yo estuve (I was)
* tú estuviste (you were)
* él/ella/usted estuvo (he/she/formal you was)
* nosotros/nosotras estuvimos (we were)
* vosotros/vosotras estuvisteis (you all were - informal)
* ellos/ellas/ustedes estuvieron (they/formal you all were)
Imperfect Tense (Past Continuous)
* yo estaba (I was)
* tú estabas (you were)
* él/ella/usted estaba (he/she/formal you was)
* nosotros/nosotras estábamos (we were)
* vosotros/vosotras estabais (you all were - informal)
* ellos/ellas/ustedes estaban (they/formal you all were)
Future Tense
* yo estaré (I will be)
* tú estarás (you will be)
* él/ella/usted estará (he/she/formal you will be)
* nosotros/nosotras estaremos (we will be)
* vosotros/vosotras estaréis (you all will be - informal)
* ellos/ellas/ustedes estarán (they/formal you all will be)
Conditional Tense
* yo estaría (I would be)
* tú estarías (you would be)
* él/ella/usted estaría (he/she/formal you would be)
* nosotros/nosotras estaríamos (we would be)
* vosotros/vosotras estaríais (you all would be - informal)
* ellos/ellas/ustedes estarían (they/formal you all would be)
Subjunctive Mood
* Present Subjunctive
* yo esté (that I am)
* tú estés (that you are)
* él/ella/usted esté (that he/she/formal you is)
* nosotros/nosotras estemos (that we are)
* vosotros/vosotras estéis (that you all are - informal)
* ellos/ellas/ustedes estén (that they/formal you all are)
* Imperfect Subjunctive
* yo estuviera (that I was)
* tú estuvieras (that you were)
* él/ella/usted estuviera (that he/she/formal you was)
* nosotros/nosotras estuviéramos (that we were)
* vosotros/vosotras estuvierais (that you all were - informal)
* ellos/ellas/ustedes estuvieran (that they/formal you all were)
Note: The subjunctive mood is used in certain grammatical constructions, such as expressing doubt, wishes, or commands.
Remember: "Estar" is used to express location, state of being, or temporary conditions.