PRESENT
PAST
PRESENT/PAST
PASSIVE TO ACTIVE
100

THE STUDENTS FEED THE ANIMALS

THE ANIMALS ARE FED BY THE STUDENTS

100

ALEXANDER FLEMING DISCOVERED THE PENICILIN.

THE PENICILIN WAS DISCOVERED BY ALEXANDER FLEMING.

100

THE FRENCH BUILT THE EIFFEL TOWER IN 1889.

THE EIFFEL TOWER WAS BUILT BY FRENCH IN 1889. 

100

THE ACTIVITY WAS EXPLAINED BY THE TEACHER

THE TEACHER EXPLAINED THE ACTIVITY

200

MARY DRIVES THE TRACTOR.

THE TRACTOR IS DRIVEN BY MARY.

200

JOSÉ HERNANDEZ WROTE THE MARTIN FIERRO.

THE MARTIN FIERRO WAS WRITTEN BY JOSE HERNANDEZ.

200

THE STUDENTS CLEAN THE CLASSROOM EVERY DAY.

THE CLASSROOM IS CLEANED BY THE STUDENTS EVERY DAY.

200

THE HOUSE WAS CLEANED BY CARLA

CARLA CLEANED THE HOUSE

300

THE TEACHER CORRECTS THE EXAMS.

THE EXAMS ARE CORRECTED BY THE TEACHER. 

300

LEONARDO DA VINCI PAINTED THE MONA LISA.

THE MONA LISA WAS PAINTED BY LEONARDO DA VINCI.

300

MY STUDENTS USE THE TRANSLATOR IN THE ENGLISH CLASS.

THE TRANSLATOR IS USED BY MY STUDENTS IN THE ENGLISH CLASS.

300

THE BALLPOINT PEN WAS INVENTED BY AN ARGENTINIAN.

AN ARGENITINIAN INVENTED THE BALLPOINT PEN.

400

WE WATER THE PLANTS

THE PLANTS ARE WATERED BY US.

400

THEY MADE BREAD YESTERDAY.

BREAD WAS MADE BY THEM YESTERDAY. 

400

Shakespeare wrote Romeo and Juliet. 

Romeo and Juliet was written by Shakespeare
400

MANY PHONES ARE SOLD BY PERSONAL COMPANY.

PERSONAL COMPANY SELLS MANY PHONES.

500

PEOPLE USE THE INTERNET EVERY DAY.

THE INTERNET IS USED EVERY DAY (BY PEOPLE).

500

THEY PAINTED THE HOUSE.

THE HOUSE WAS PAINTED BY THEM.

500

People used horses for transportation.

Horses were used for transportation (by people)

500
ENGLISH IS SPOKEN BY MILLIONS OF PEOPLE AROUND THE WORLD

MILLIONS OF PEOPLE AROUND THE WORLD SPEAK ENGLISH.