Unit 7 Tall Buildings Part A,Lets learn,序数词,基数词变序数词的规律,A:I live in that building,B: Which floor do you live on,A:I live on the twelfth floor,A:Tom lives in that building,B: Which floor does he live on,A:He lives on the eleventh floor,A:Rose lives in that building,B: Which floor does she live on,A:She lives on the thirtieth floor,Lets do,把基数词改成序数词,first,second,third,seventh,ninth,fortieth,twenty-third,Lets practice,A:I live in that building,B: Which floor do you live on,A:I live on the _ floor
