Question: oraciones con are y con is?
Answer: I am a good student. (Yo soy un buen estudiante).
We are old friends. (Nosotros somos viejos amigos).
He is a student. (Él es un estudiante).
The pencil is on the desk. (El lápiz está sobre el escritorio).
She is absent from class today. ... 
They are friends. ... 
The weather today is good. ... 
The sky is clear.