I have some questions about using ser or estar

1.If I am from a place I would use soy and if I am in a place I would use estoy?
2.If you are sick, I would use estás-form of estar?
3.¿Dónde están ellos?

3 answers

Sorry the post is so odd but I couldn't actually post the Yo soy de Brazil or Yo estoy en Brazil for the first two or the other two where I asked if you were enfermo would I use the estar form
Yes, and please refer to my more complete answer in your later post.

Sra
Why aren't u teacher if my kids good this but y'all are over here teaching bad things