перевести предложения в Present Past and Future Indefinite в отрицательной и вопросительной форме. помогите пожалуйста: His wife Anna Petrovna could not work at the plant or an office because they had three children. She had to look after them

Present:His mother Anna Petrovna cannot work at the plant or an office because they have three children.She looks after them.
Past: His wife Anna Petrovna could not work at the plant or an office because they had three children. She looked after them.
Future: His wife Anna Petrovna will not work at the plant or an office because they have three children. She will look after them.