Final answer:
'Ser' and 'estar' cannot be used interchangeably in Spanish as they have different meanings and uses. 'Ser' is used for permanent characteristics, while 'estar' is used for temporary states and conditions.
Step-by-step explanation:
No, 'ser' and 'estar' cannot be used interchangeably. While both verbs translate to 'to be' in English, they have different meanings and uses in Spanish.
'Ser' is used to talk about permanent characteristics of a person or thing, such as nationality, profession, and inherent qualities. On the other hand, 'estar' is used to talk about temporary states, locations, and conditions.
For example, 'soy estudiante' (I am a student) uses 'ser' because being a student is a permanent characteristic, while 'estoy cansado' (I am tired) uses 'estar' because tiredness is a temporary state.
Learn more about Differences between 'ser' and 'estar' in Spanish