题目内容

______ it rain tomorrow, we would have to put off the visit to the Water Cube.

A. ShouldB. CouldC. HadD. Were

 

A

【解析】

试题分析：条件句的虚拟语气是考查的重点。如果过去事实相反，条件句中使用过去完成时，主句使用“情态动词+have done”;如果主句与现在事实相反，条件句中使用过去时，be动词使用were,主句中使用“情态动词+动词原形”；如果与将来事实相反，条件句中有三种：过去时；were to do ;should+动词原形，主句使用“情态动词+动词原形”；要特别注意如果省略了if，句子要使用部分倒装的形式，把助动词，be动词，情态动词提之主语前。根据本句中的tomorrow可知这是与将来事实相反的虚拟语气，使用should+动词原形，而且省略了if，构成部分倒装的形式。句义：如果明天下雨，我们就推迟去水立方的参观。故A正确。

考点：考察虚拟语气和倒装

 

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