Exercise: Change the sentences as indicated.

1. (+) Laura cuts the cake at parties. 
1. (-)  Laura doesn´t cuts the cake at parties.
2. (-) Mr. Gómez doesn't ride his bike to school.
2. (+) Mr.Gómez rides his bike to school.
3. (+) The reporter writes crime articles every night.  
3. (-)  The reporter doesn´t writes crime articles every night.
4. (-) Avocados don't cost $20.00 a kilo.
4.(+) A vocados costs $20.00 a kilo.
5. (+) Mrs. Phyllips gives the children chocolate cookies.
5. (-)Mrs. Phyllips doesn´t give the children chocolate cookies.
6. (-) The mechanics don't fix motorcycles.
6.(+) The mechanics fix the motorcycles.
7. (+) Tom and Jerry fight in the house. 
7. (-)   Tom and Jerry don´t fight in the house.
8. (-) Dr. Brady doesn't play golf on Tuesdays. 
8. (+) Dr. Brady play golf on Tuesdays. 
9. (-) The cooks don't make bread.
9. (+) The cooks make bread.
10.(+) Mrs. Jefferson listens to the students.  
10. (-) Mrs. Jefferson doesn´t  listens to the students.