是this is my sister kate吗

是this is my sister kate吗 （this）is my sister This is my sister.改为复数形式、 This is my sister(变为复数句) This is my sister.(改为一般疑问句) oh,jane,this,is,my,sister,kate. this is not my sister 缩写 This is for my sister是什么意思 this girl is my sister.这句对么这句对么...或者是the girl is my sister? This girl is my sister 对划线部分提问：（my sister)对（my sister)提问 This is my sister a什么that is my brother? And this is my sister和This is my sister的区别, This is my sister.________name is Mary.空处填什么? The mirror is my sister's.对划线部分提问：my sister's是：Whose the mirror is this?还是：Whose is the mirror?还是其他? 什么时候用she is my sister ?什么时候用this is my sister?急!急! 什么时候用this is my sister,什么时候用she is my sister? 这个英语对话的正确答案是?---Whose sweater is this ---It's __________.A.my sister's,Jenny's B.my sister's Jenny C.my sister,Jenny'sD.my sister,Jenny 疑问句转换陈述句This is my sister 转换成一般疑问句的形式是什么啊?This is your sister 转换成一般疑问句的形式又是怎样?