搜搜做题作业网__ he fail to come over,what could we do without him?For you
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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
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
再问： 你怎么知道要道装
再答： 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。
再问： 怎么看呢》》》？？？？
再答： 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。 本来想选if的， 但看到第二句用了个could，就说明第一句肯定是虚拟语气了。 如果选if，那he后面还得用个should， 但选B就OK了，只要把should提前，if就可以省略。
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
再问： 你怎么知道要道装
再答： 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。
再问： 怎么看呢》》》？？？？
再答： 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。 本来想选if的， 但看到第二句用了个could，就说明第一句肯定是虚拟语气了。 如果选if，那he后面还得用个should， 但选B就OK了，只要把should提前，if就可以省略。
__ he fail to come over,what could we do without him?For you
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could you come over to my house .sorry ,i ---.i have to do m
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请问we planned for him to come
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He could do nothing but wait for the bus to come