1,she isn't my sister;2,she's not my sister;这两个写法都对吗?感觉看到书上的

1,she isn't my sister;2,she's not my sister;这两个写法都对吗?感觉看到书上的 Gina isn' t my sister. She's f打头的都有什么单词家庭成员She is not my sister,she's my f____ ___填什么 She's my little sister. She's my sister.变否定句时,写成She's not my sister或She is not my si My aunt has a sister.She isn't my aunt.Who is she?A.my mothe What's my sister's job?Is she a nurse?这2句句式对吗. she's my sister.my parents' good ---- she's my sister.对my sister提问 she is my sister. She’s my sister.改为一般疑问句 She is a friend ( )my sister's