Passive or active voice

Active voice describes a sentence where the subject performs the action stated by the verb.  In passive voice sentences, the subject is acted upon by the verb. ​

Check your understanding with these online quizzes

• Active-Passive 1 
  
• ​Active-Passive 2

For example

• ​The science class viewed the comet. (active)
• The comet was viewed by the science class. (passive)

• Who ate the last cookie? (active)
• The last cookie was eaten by whom? (passive)

• Alex posted the video on Facebook. (active)
• The video was posted on Facebook by Alex. (passive)​