itraintomorrow,themeetingwouldbeputoff.A．Should  ...

问题详情：

       it rain tomorrow, the meeting would be put off.

A．Should                                                     B．Would

C．Could                                                       D．Must

【回答】

A

【解析】

本题考查与将来事实相反的虚拟语气，故从句用should + v原形。句意：如果明天下雨，会议将会被推迟。此处是if引导的非真实条件句，如果把if省略，则将情态动词should提到主语的前面。故选A。

【点睛】

if 的虚拟语气讲解

1.对现在情况的假设：表示说话时不存在或与事实相反的情况.形式：If+主语+did,主语+should/ would /could +do.例句：If you knew english well,you would be able to talk with foreigners freely.

2.对过去情况的假设：表示与过去事实相反的情况.形式：if+主语+had done,主语+should/would /could+have done.例句：if i had not studied hard ,i might have failed in the exam.（事实是我通过考试了）

3.对将来情况的假设：表示将来实现可能*不大的情况.形式：if+主语+did/were to do /should do,主语+should /would /could do.例句:if he should change his mind ,what would we do?

if的省略：在正式文体中,有时可把虚拟条件句中的连词if省去,这时从句需要采用倒装语序,即：将were,had,should等助动词提到主语前面,主句不做任何变化.例句：should it rain tomorrow,we would staly at home.

错综时间：所谓错综时间是指主句和从句的动作不是发生在同一时间.这时,需要根据意思选用表示不同时间的虚拟语气形式.例句：if i were you ,i would have taken his advice.（从句表示现在时间,主句表示过去时间）,我要是你,就听他的忠告了。

知识点：虚拟语气与情态动词

题型：选择题