帮忙看看这句英语写的有错么Common as the phenomenon is,the problem behind it is worth our attention
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应该这样改,Common as the phenomenon is the problem behind (which) is worth our attention.把it改成which,这是一个长句,就不能出现两个主语（problem和it不能共存）,把it改成which这就变成了定语从句,就可以了.
======以下答案可供参考======
供参考答案1:
the problem behind (去掉it) is worth (to pay) our attention
供参考答案2:
这句话对的~~虚拟语气~~Though the phenomenon is mon~。。。对的~~
供参考答案3:
Common as the phenomenon is,the problem behind it is worth our attention.本句是正确的，Common as the phenomenon is是部分倒装，相当于Though the phenomenon is mon;
the problem behind it 介词短语behind it 可以做定语修饰the problem.