Present Simple: The boy writes on the black board.Present Continuous: The boy is writing on the black board.Present Perfect: The boy has written on the black board.Past Simple: The boy wrote on the black board.Past Continuous: The boy was writing on the black board.Past Perfect: The boy had written on the black board.Future Simple: The boy will write on the black board.Future Continuous: The boy will be writing on the black board.Future Perfect: The boy will have written on the black board.