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词汇：1.称呼类词汇：sister 姐;妹 mother妈妈 father爸爸

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 = that is   he’s = he is

3. 本单元出现的指示代词：these 这些  those 那些

4. thanks for 为……而感谢

句式：1. This/that/These+ be动词+ sb’s …

This is his sister.  That is my brother. These are his brother.

2. be动词+代词+…Is this your sister?    Is she your sister?