Describe two instances in which you would use the verbs ser and estar.

1. Use of the verb "ser":

- To talk about permanent characteristics: When describing someone's physical appearance, personality traits, nationalities, professions, or relationships. For example, "Él es alto" (He is tall), "Ella es inteligente" (She is intelligent), "Somos hermanos" (We are siblings).
- To express time or dates: When talking about what time it is or on which day an event occurs. For instance, "Son las dos de la tarde" (It is two in the afternoon), "Hoy es lunes" (Today is Monday).

2. Use of the verb "estar":
- To express temporary states or conditions: When discussing emotions, feelings, location, or health conditions. For instance, "Estoy cansado" (I am tired), "Estás feliz" (You are happy), "La tienda está en la esquina" (The store is on the corner), or "Mi hermana está enferma" (My sister is sick).
- To talk about ongoing actions: When describing actions that are in progress at the moment of speaking. For example, "Estoy estudiando" (I am studying), "Está hablando por teléfono" (He/she is talking on the phone).

It's important to note that the choice between ser and estar can sometimes depend on the context and can have different meanings. Therefore, understanding the nuances and correctly using these verbs in Spanish can be challenging.