my sister is bag is purple否定句和一般疑问句和sister划线提问

my sister is bag is purple否定句和一般疑问句和sister划线提问
my sister is bag is purple否定句和一般疑问句和sister划线提问

my sister is bag is purple否定句和一般疑问句和sister划线提问
my sister's bag isn't purple
Is my sister's bag purple?
Whose bag is purple?