If it ____for the snow, we____ the mountain yesterday.A．were not, could have cl
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If it ____for the snow, we____ the mountain yesterday.| A．were not, could have climbed | B．were not, could climb | | C．had not been, could have climbed | D．hadn’t been, could climb |
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答案
| C |
解析
试题分析：考查条件句的虚拟语气：句意：要不是因为昨天的雪，我们就会爬到山上了。可知这是和过去相反的if虚拟条件句，if从句用If主语+had+done；主句：主语+should/would/could/might+have done，选C。
点评：if的虚拟语气非常重要，简要概括如下：1、表示与现在事实相反的情况，从句：If主语+过去时(Be动词用were)；主句：主语+should/would/could/might+do： 2、表示与过去事实相反的情况，从句：If主语+had+done；主句：主语+should/would/could/might+have done 3、表示对将来情况的主观推测，从句：①if+主语+were to do②if+主语+should+do ③if+主语+did（动词过去式）/were ；主句：主语+should/would/could/might+do |
举一反三
---Ann looks hot and dry.
---So _______ you if you had a high fever. |
--- Did they attend the opening ceremony?
---They _, but they were late and quit it.| A．would | B．would have | C．didn"t | D．will have to |
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The teacher demanded all the exercise books ______ the next day.| A．to be handed in | B．would be handed in | C．be handed in | D．to hand in |
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Look at the trouble I am in! If only I your advice!| A．followed | B．had followed | C．should follow | D．would follow |
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Had I known her name，I________.| A．would invite her to lunch | B．would have invited her to lunch | | C．invited her to lunch | D．could invite her to lunch |
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