Unit7TallBuildingsPartALet’slearn序数词基数词变序数词的规律A:Iliveinthatbuilding.B:Whichfloordoyouliveon?A:Iliveonthetwelfthfloor.A:Tomlivesinthatbuilding.B:Whichfloordoesheliveon?A:Helivesontheeleventhfloor.A:Roselivesinthatbuilding.B:Whichfloordoessheliveon?A:Shelivesonthethirtiethfloor.Let’sdo把基数词改成序数词firstsecondthirdseventhninthfortiethtwenty-thirdLet’spracticeA:Iliveinthatbuilding.B:Whichfloordoyouliveon?A:Iliveonthe____floor.twelfthA:Iliveinthatbuilding.B:Whichfloordoyouliveon?A:Iliveonthe____floor.eighthTHANKYOU