transforma de positivo a negativo. ( en inglés)
ejemplo: I'm playing I'M NOT playing.

1) this exercise is diffilcut.
______________________

2)we're from spain.
______________________

3)My grandmother'S name's Adelaide.
______________________

4)thes kids are in the garden.
______________________

5)you're english.
______________________

6) My car is very expensive.
______________________

7) this is my student's notebook.
______________________

8) these photographs are very nice.
______________________

9) Jerry is twenty-five years old.
______________________

10) I'm fine.
______________________

11) He is from Mexico.
______________________

12) You are in this class.
______________________

13) they are inmigrants
______________________​