分类：娱乐-音乐
问题：Isthisyoursister?的回答关于一般疑问句的回答Is 
关于一般疑问句的回答Is this your sister?的肯定和否定回答究竟是Yes, is/No,it isn't.还是Yes,she is./No,she isn't.为什么？
回答：For example:
   如果问Is this your sister?  则Yes,it is./No,it isn't.
   如果问Is she your sister?   则Yes,she is./No,she isn't.