一道英语语法单选的问题

Question

31. ____ , we would go on a picnic .
A. The weather is fine B. Should the weather be fine
C. The weather be fine D. Would the weather be fine
为什么B

Answer 1

你问的是关于 虚拟语气中if的省略 的问题。

虚拟条件句中有were, had, should时, 可把if省略,而把were, had, should
放在主语前,用倒装结构, 这种结构主要用于书面语中．
如：
1．Were it necessary, I might resign．＝If it were necessary, I might resign．
2．Had you informed me earlier, I would not have signed the contract．
＝If you had informed me earlier, I would not have signed the contract．
3．Should I have time, I would call on her．＝If I should have time, I would call on her．
4．Should it rain tomorrow, we would have to put off the visit to the Summer Palace．
＝If it should rain tomorrow, we would have to put off the visit to the Summer Palace．
5．Should I meet her, I would tell her．= If I should meet her, I would tell her．
6．Were I in your position , I would do it better．= If I were in your position, I would do it better．
7．Were he to tell us everything, we could try to solve his problem．
8．There is a real possibility that these animals could be fright ened, should there be a sudden noise．
9．Had they made preparations, they would have succeeded．= If they had made preparations, they would had succeeded．
10．Were I in school again, I would work harder.= If I were in school again, I would work harder．
11．Had you been here earlier, you would have seen him．＝If you had been here earlier, you would have seen him．
12．Were it not for the expense, I would go to Italy．＝If it were not for the expense, I would go to Italy.

你的问题和上面的例题3、4、5一样的，正常语序是 If the weather should be fine ,we would go on a picnic . 此外本题if从句是对将来的推测，所以可用should+do 的形式，不知你明白了吗？

Answer 2

这道题考查三个语法知识,第一个是虚拟语气,第二个是倒装,第三个是省略.所以这道题是省略了if的虚拟条件句,在这种条件从句中表示将来的一种情况要用should,把should提前是因为省略了if,用了倒装语序.(意思是一旦明天天气好,我们去野餐.)

Answer 3

虚拟语气。。。。

与将来事实相反。。。。