How to conjugate "ser" for something other than people.
I am not sure I am even asking the right question, but is this correct?
My accounting class and Earth science class are online.
Mi clase de contabilidad y clase de ciencia de la Tierra es por internet.
I am wondering if es is the correct word to use.
1 Answer
Responding first to the title of your question, you conjugate ser (and estar) exactly the same with things as you do with people. You use the 3rd person plural when you are talking about mutliple things just like you would with people to refer to they (ellos) or multiple you (ustedes).
In this case you would use son instead of es because there are two classes on the internet. Except one should use estar instead of ser for the location of something unless it is an event that took place at one particular time. Given the recurring / continuous nature of classes, I wouldn't consider that an event.
In terms of your complete sentence, there are multiple ways it can be expressed.
Mis clases de contabilidad y ciencia de la tierra se realizan a través de Internet.
My classes of accounting and earth science are performed via the internet.
My classes of accounting and earth science are done on the internet.
Mis clases de contabilidad y ciencias de la tierra se hacen en Internet.
In both of these examples I use the passive se construction. We are not saying who performs or does the classes, we are just saying where or how they are done.
Mis clases de contabilidad y ciencias de la tierra están en línea.
My accounting and earth science classes are online.
Note the use of estar instead of ser. (location) Since there are plural classes you need to use están instead of está.
You could also use por, as you did, instead of a través de as I did.
Mis clases de contabilidad y ciencia de la tierra se realizan por Internet.
(here por could be translated as by, by means of, through or via)
I am not a native so you may wish to wait for another answer.
