known about
To know about something is to understand something about it.
Example: What do you know about Australia?
Known is the past participle of the irregular verb know. Follow the link to find out more and to listen to examples.
more information: know
left
Here left is the past participle of the irregular verb leave. Follow the link to find out more and to listen to examples.
more information: leave
gone
Gone is the past participle of the irregular verb go. Follow the link to find out more and to listen to examples.
more information: go
found
Here found is the past participle of the irregular verb find. Follow the link to find out more and to listen to examples.
more information: find