My sister's boy friend是什么意思

My sister's boy friend是什么意思 S __is my sister my sister's name Happy Valentine's day to my friends什么意思 Happy Valentine's day to my frie did a boy friend of my sister's go to the party?这句有错吗 I is bad boy .Don't say me so good .but you is my frie .don't for get . My mother's s.is my sister. She's my little sister. My father's d___ismy sister she's my sister.对my sister提问 MY father's sister is my My sister is my mother's( ) MY father's sister is my my father's sister is my a________ My sister's daughter is my ( ) 将这几个句子改为单、复数句1.These are my parents.______ _______ _______ my____2.That boy is my sister‘s friend _______________ _________are my sister's friend She's my sister,对sister提问（）（） she is my daughter.A sister B sister's Cshe is my daughter.A sister B sister's C sisters