Using Ser de

As we have seen before, the verb ser can be used in a myriad ways and is one of the very first verbs we need to master in the Spanish language. You can use the verb ser(to be) plus the preposition de to form several simple expressions that take on different meanings depending on the context of the sentence in which it is used.

Ser de is used in the following three instances:

1)to express origin, of a person or thing
Yo soy de California. I am from California.


2)to express possession
Esta computadora es de Dave. This is Dave's computer.


3)to express material or composition
Mi camisa es de algodón. My tee shirt is made of cotton.