__ he fail to come over,what could we do without him?For you see,we don't have the key to the lab!A If B should C Whether D unless

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__ he fail to come over,what could we do without him?For you see,we don't have the key to the lab!A If B should C Whether D unless

__ he fail to come over,what could we do without him?For you see,we don't have the key to the lab!A If B should C Whether D unless
__ he fail to come over,what could we do without him?For you see,we don't have the key to the lab!
A If B should C Whether D unless

__ he fail to come over,what could we do without him?For you see,we don't have the key to the lab!A If B should C Whether D unless
选B
这是虚拟语气,表假设的.正常的句子应该是:If he should fail to come over,倒装之后就把if省掉,把should提前了.if + should构成虚拟语气

他不来了,我们能做些什么呢?你看,我们没有钥匙的实验室!

选B
这是虚拟语气,表假设的。正常的句子应该是:If he should fail to come over, 倒装之后就把if省掉,把should提前了。 if + should构成虚拟语气你怎么知道要道装不倒装也是对的,但你的这个句子用的就是倒装啊,我看出来的。怎么看呢》》》????首先通读整句对话,理解到是假设句,就是说,如果他不来,我们就进不去,因为我们没有实验室的钥匙。 ...

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选B
这是虚拟语气,表假设的。正常的句子应该是:If he should fail to come over, 倒装之后就把if省掉,把should提前了。 if + should构成虚拟语气

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答案:A
译文:如果他来不了了,我们该怎么办?我们并没有实验室的钥匙。

B should 。。。。是省略if的一种虚拟条件,译为:万一。。。
希望可以帮到你,有问题继续追问!

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