Exercise: Change the sentences as indicated.

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