安检人员承认，在那个包裹被送进来之前，并没有经过任何检查。
The security staff admitted that the package hadn't been checked before it was brought in.
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hadn't英 /ˈhædnt/|美 /ˈhædnt/
been英 /biːn/|美 /bɪn/
解释
hadn't been checked 是过去完成时被动否定。hadn't = had not，been checked 构成被动语态，表示在被带入之前的未检查状态。
The security staff admitted that the package hadn't been checked before it was brought in.
hadn't been checked 是过去完成时被动否定。hadn't = had not，been checked 构成被动语态，表示在被带入之前的未检查状态。