The forms of the verb "estar" in the present tense are:
- Yo estoy (I am)
- Tú estás (You are - informal singular)
- Él/Ella/Usted está (He/She/You are - formal singular)
- Nosotros/Nosotras estamos (We are)
- Vosotros/Vosotras estáis (You all are - informal plural, used mainly in Spain)
- Ellos/Ellas/Ustedes están (They/You all are - formal plural)
Example sentence using the verb "estar":
"Yo estoy cansado después de trabajar todo el día."
(I am tired after working all day.)