El libro que leí es interesante.
English: The book that I read is interesting.
Advanced use of Spanish relative pronouns helps you connect sentences and add more information about people, things, or ideas. These pronouns include words like 'que', 'cual', 'quien', and 'cuyo'.
Use Spanish relative pronouns to join two sentences, give extra information, or specify which person or thing you are talking about. Advanced forms help you be more precise or formal, or refer back to a whole idea, not just a noun.
El libro que leí es interesante.
English: The book that I read is interesting.
La persona a quien llamé no contestó.
English: The person whom I called did not answer.
La casa en la que vivo es antigua.
English: The house in which I live is old.
El profesor, cuyo coche es rojo, llegó tarde.
English: The teacher, whose car is red, arrived late.