题目内容
14.If we had taken such effective measures much earlier,the fiver so seriously now.( )A. | is not polluted | B. | would not be polluted | ||
C. | had not been polluted | D. | would not have been polluted |
分析 如果我们早点采取这些有效措施,现在这条河就不会被严重污染了.
解答 答案:B 题干表达与事实相反的假设,要用虚拟;主句表达的是对现在事实的相反假设,要用情态动词加动词原形来构成.故选B.
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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