def convert_drive(self, shift, instruction):
        """Return converted `PulseInstruction`.

        Args:
            shift(int): Offset time.
            instruction (PulseInstruction): drive instruction.
        Returns:
            dict: Dictionary of required parameters.
        """
        command_dict = {
            'name': instruction.command.name,
            't0': shift+instruction.start_time,
            'ch': instruction.channels[0].name
        }
        return self._qobj_model(**command_dict)