PASSIVE VOICE.
- In sentences in the active voice, the primary focus is on the subject. To
give primary focus to the object of the sentences, the sentence can be changed
to the passive voice.
Active:  Nine planets
  orbit   the
sun.  (Focus: nine planets)
Passive:  The sun is   orbited
by   nine planets.  (focus: The sun)
Active:  The USA coordinated the first space programs. Passive:  The first space programs were coordinated
by  the USA.