they are their good friands改为一般疑问句

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they are their good friands改为一般疑问句
they are their good friands改为一般疑问句

they are their good friands改为一般疑问句
Are they their good friends?
解析:含be动词的第三人称复数句子改为一般疑问句提前be动词,不明白可以继续追问.