You should only address others with “tu” when they are your age or younger. You use usted with people older than you like a grandparent or some random older person on the street you might run into.
Examples of how to use books in a sentence:
Puedo leer un libro.
Me gusta leer libros.
Cuando leo libros uso mi imagination.
Answer:
aprendimos
Explanation:
nosotors always ends that way
The land form
thats the answer hope i helped.