· Ser and estar both mean “to be.” They are used differently. You have to learn the conjugations as well as the uses of each.
SER – to be
Uses of ser:
C – Characteristics (physical and/or personality)
O – Origin (where you’re from)
I – Identity (profession, relationship, possession)
N – Nationality
ESTAR – to be
Uses of estar:
To tell how you feel or where you are, always use the verb estar.
· Feelings (or how a person is at the moment – cansado)