I didn't manage to do it ____ you had explained how.A until B unless C when D before D为什么不对?
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Ididn''tmanagetodoit____youhadexplainedhow.AuntilBunlessCwhenDbeforeD为什么不对?Ididn''tmanagetodoit____you
I didn't manage to do it ____ you had explained how.A until B unless C when D before D为什么不对?
I didn't manage to do it ____ you had explained how.A until B unless C when D before D为什么不对?
I didn't manage to do it ____ you had explained how.A until B unless C when D before D为什么不对?
I didn't manage to do it ____ you had explained how.
这句话的意思是：直到你解释了如何做,我才做到.
这里应该是考not...until（直到...才）的用法.答案应该是A
如果选D
before如果后接从句,动词应该是过去式,因为before后面的动作应该是瞬间动作不能延续.此句里you had explained how用的是过去完成时,是延续的一种状态.因此不对
D的话应该把you explained how改成you explained how
选A吧。
选B
before用于时间前后的关系
i didn't manage to do it_____you had explanied howAuntil Bunless Cwhen Dif
i didn't manage to do it_____you had explanied howAuntil Bunless Cwhen Dif
I didn't manage to do it ____ you had explained how.A until B unless C when D before D为什么不对?
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i didn't manage to do it 空格 you had explained it now ; a:until; b:when ; c :
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