I have already been in China .
另外.如果是单单要强调回来了.
建议你还是采纳come back
如果强调在中国的话.
建议你用be in
我已经回到中国了怎么用英语表达?
I have backed in China.
这句话一点都不地道，地道一点的应该说：
I have been in China.
I have been in China.
这样的回答比较适合点.BENN比较适合.
i am back in China now
I have already came back to china!
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