"My house is big."
Translation:Ma maison est grande.
No. At the limit you could say "Chez moi c'est grand" or "C'est grand chez moi" but thats not proper.
The conjugates have never been taught prior to this lesson. It should be taught the same way the other words are to learn the proper usage of each. I am spending a lot of time guessing how each possession is supposed to be used with no clear understanding at all.