I have a sister who plays piano.

I have a sister who plays piano. I have a sister who works in Beijing.=I have a sister.The sister works in Beijing. I have a sister who works in Beijing.= I have a sister.She works in Beijing.这里的she可不可以用the sister代替啊? i donts have a sister还是i dont have sister I have a sister.She works in Beijing.I have a sister who works in Beijing,这里的定语从句中who指代的是什么 是a sister还是she I have a sister.She works in Beijing.I have a sister who works in Beijing,这里的who是指代a sister 那为什么改为简单句的时候就要变成she了呢 这样有矛盾吗? I have a sister who works in Beijing.这句的who指代的是a sister吗 改为简单句是不是I have a sister,She works in Beijing. i wish i ( ) a sister (have) ? I have a sister 改写I have a sister 中对 a sister 进行提问 I have a sister的同义句 I have a sister.She works in Beijing.I have a sister who works in Beijing,这里的who是指代a sister 那为什么改为简单句的时候就要变成she了呢 这样有矛盾吗?那么who究竟指代的是she还是a sister啊 I have a sister she is eight=I have_________sister Lily is my sister.I have()sister I have a sister but no brothers是什么意思 连词成句：have,no ,I ,a ,but ,sister ,brother (.) I have a sister and tow brother.___are all students. I have a little sister中的little作? have,no I,a,but ,sister,brother(.)拼成一句话