我来试试：
A = Hadn't it been = Had not it been,不符合虚拟语气的倒装句结构.
B = Had it not been (虚拟语气的倒装句=If it had not been)
____for your help,we wouldn't have succeeded.
____for your help,we wouldn't have succeeded.
A,Hadn't it been B,Had it not been C,If it had been D,If it were
但是A和B的区别在哪儿?
A,Hadn't it been B,Had it not been C,If it had been D,If it were
但是A和B的区别在哪儿?
英语人气：106 ℃时间：2019-10-27 05:53:55
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