And so he promised with an oath to give her whatever she would ask of him.
Whereupon he promised with an oath to give her whatsoever she would ask.
And so he promised with an oath to give her whatever she might ask.
Whereupon he promised with an oath to give her whatsoever she should ask.
Then he swore to give her anything she asked.
Whereupon he promised with an oath, to give her whatsoever she would ask of him.