brother兄;弟grandmother祖母;外祖母grandfather祖父;外祖父
aunt姑母;伯母;婶母uncle叔;伯;舅;姨夫son儿子
cousin表(堂)兄弟(姐妹)daughter女儿
2.本单元出现的缩写：that’s=thatishe’s=heis
3.本单元出现的指示代词：these这些those那些
4.thanksfor为……而感谢
句式：1.This/that/These+be动词+sb’s…
Thisishissister.Thatismybrother.Thesearehisbrother.
2.be动词+代词+…Isthisyoursister?Issheyoursister?
3.Thanksfor…Thanksforthephotoofyourfamily.
4.Here+be动词+…Hereismyfamilyphoto.