定语从句改 疑问句The girl who is standing there is my sister.改成疑问句.转

Is the girl who is standing there your sister?
其中 who is standing there是定语从句部分,修饰 the girl
如果把它去掉,那么句子就是：
The girl is my sister.
变成疑问句式：
Is the girl your sister?
添加了定语从句后并不影响变成疑问句,只要还把定语从句放在the girl 先行词后面即可.
Is the girl （who is standing there）your sister?
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