Change the voice. 'The fan is rotated by an engine'.
AAn engine rotates the fan
BAn engine is rotated the fan
CAn engine was rotated the fan
DAn engine has rotated the fan
AAn engine rotates the fan
BAn engine is rotated the fan
CAn engine was rotated the fan
DAn engine has rotated the fan
Related Questions:
Change into Passive voice .
Respect your elders.
The passive form of "Will the police arrested the union leader ?"