Is she your sister?怎么变成复数形式

She is your sister sister,Lily IS she your sister,Lucy? Is this your sister?与Is she your sister?区别 she is your sister怎么排列 is sister she your 连词成句 She is your sister 和Is she your sister哪个正确 Is she your father's sister,your( )Alice? Where is your sister?She is at home. ---Where is your sister?---She is photos in the garden? how old is your sister?she is 11 years old. what is your sister.像.she is slim Is this ( ) your sister,Linda?Yes,She is. is that your sister?is she your sister?yes,___ ___ yes,___ ___ Is this your sister 与Is she your sister?的区别 Yes,she is.She is my sister (上一句是什么) Is she your mother?(下一句是什么） Is she your sister?怎么变成复数形式 Is she your sister?改为复数怎么改? Your sister is too young .You can't leave___by___.(she)