题目内容
6.The weather turned out to be fine yesterday.I _______ have taken the trouble to carry my umbrella with me.( )A. | should | B. | could | C. | needn't | D. | mustn't |
分析 昨天天气不错.我本不必带雨伞那么麻烦.
解答 答案:C 句意表达的是对过去事实的相反假设,要用虚拟;对过去的相反假设,要用情态动词加完成时态来构成;should应该,could能够,needn't不必,mustn't不准.故选C.
点评 虚拟语气是表示与事实相反的假设,构成方式有:对现在或将来,条件句中用一般过去时态,主语用情态动词加动词原形;对过去,条件句中用过去完成时态,主语用情态动词加完成时态.学习时,要牢记构成方式.
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