Grammar Reference
Form
| 
			 
  | 
		Active | Passive | 
|---|---|---|
| 
			 Present simple  | 
		
			 They make Toyota cars in Japan.  | 
					 Toyota cars are made in Japan.  | 
	
| 
			 Past simple  | 
		
			 Columbus discovered America.  | 
					 America was discovered by Columbus.  | 
	
The passive allows the object of an active sentence to be used as the subject of a sentence.
The passive is used when:
-the agent (person or thing which does an action) is not known or isn't important.
-the speaker is more interested in the object of the active sentence.