Written by Tim Corson and Rebecca Smollett, University College Writing Centr. University of Toronto What is passive voice? In English, all sentences are in either “active” or “passive” voice: active: Werner Heisenberg formulated the uncertainty principle in 1927. passive: The uncertainty principle was formulated by Werner Heisenberg in 1927. In an active sentence, the person or thing responsible for theContinue reading “PASSIVE VOICE: WHEN TO USE IT AND WHEN TO AVOID IT”