问题
选择题
If there hadn’t been so much smog in Beijing, we______________ the beautiful scenery across the Tiananmen Square.
A．enjoyed
B．would have enjoyed
C．had enjoyed
D．would enjoy
答案
答案：B
题目分析：句意：如果在北京没有这么多烟雾，我们在穿过 * * 广场时能够欣赏到很多漂亮的风景。if引导的从句如果表示与事实相反或是假设，要用虚拟语气。本题中对过去进行虚拟，主句用would have done.
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