1.They have been selling their flat in the sity.
2.They are moving to the country on March 12.
3.They have been buying a farm.
4.They have been getting a puppy.
5.They are taking their children to their new school on September 7.
6.They have been having a house-warming party.
Объяснение:
Формула Future Simple : предлог + глагол + ing-овое окончание,
Present Continuous : to have + been + глагол с ing окончанием,
Удачи!
