This is called the passive voice. (Notice how I used it.) The difference between 'be' and 'get' is very small. In fact, most of the time they are interchangeable.However, here is the difference: 1. To be is always correct. 2. To get- used when the action is sudden, happens over and over again, or talks about a change in status. Therefore, you can use get or be in your sentence. Get works because being robbed is sudden, it talks about a change in status (having money>not having money), and it could be a recurring event (You'll get robbed at least once a month.) In my first sentence, I couldn't say, "This gets called the passive voice." because the action is not sudden, and it doesn't describe a change in status.

get = change of state be = existing state ...,you'll get robbed. There is a change here: from "not being robbed" to "being robbed". Hence you say: get robbed.

hola! estas aprendiendo español? si quieres te puedo ayudar solo agregame al messenger [email protected] tambien al skype josefrancisco8379 y tu me enseñas ingles ok

good question:) I'd love to wait the answer too haha