`10.` Could the door be locked by Jenny?
`11.` The rules may be forgetten quickly.
`12.` The lesson should be studied repeatedly.
`13.` The competition must be won by Bejamin.
`14.` The game should be canceled.
`15.` She can't be persuade by the dotor.
`16.` My car need to be repaired.
`->` Câu bị động với Modal V: S + modal V + be + VptII.