Ser is used to indicate equivalence or identity:
Alberto es médico. - Alberto is a doctor.
María es una buena persona. - Maria is a good person.
Ramón es colombiano. - Ramon is Colombian.
Ser is used to indicate origin:
Diego es de Perú. - Diego is from Peru. Este tapete es de México. - This rug is from Mexico.
Ser is used to talk about time:
son las dos - It's two. es la una y media - It's one thirty.
La sopa es buena. - The soup is good. María es alta. - Mary is tall. Tu eres guapo. - You are handsome. Pedro es español. - Peter is Spanish. El libro es rojo. - The book is red. María es francesa. - Mary is French. La casa es grande. - The house is large. La lección es fácil. - The lesson is easy. Tu eres muy especial. - You are very special. Ella es feliz. - She is happy. La química es interesante. - Chemistry is interesting. Pablo es francés. - Paul is French. La silla es nueva. - The chair is new. La silla es vieja. - The chair is old. Tu eres muy bonita. - You are very beautiful. La silla es azul. - The chair is blue. La silla es alta. - The chair is tall. El sofá es viejo. - The sofa is old. Tu eres feo. - You are ugly. El sofá es celeste. - The sofa is light blue.
Rodrigo es de México. - Diego is from Mexico. Este auto es de México. - This car is from Mexico. La silla es alemana. - The chair is from Germany. El espejo es chino. - The mirror is Chinese. Elena es italiana. - Elena is Italian. Mateo es de Francia. - Matthew is from France. Alberto es de Barcelona. - Alberto is from Barcelona. Mamá es americana. - Mom is American. El libro es irlandés. - The book is Irish. Papá es inglés. - Dad is English.