All the flights ______ because of the sn

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问题 All the flights ______ because of the snowstorm, we had to take the train instead.A.were canceleDB.had been canceleDC.having canceleDD.having been canceleD.

选项 A.were canceleD
B.had been canceleD
C.having canceleD
D.having been canceleD.

答案 D

解析 本题考查非谓语

句意:所有的航班因为暴风雪已经取消了,我们决定乘坐火车

独立主格结构在句中一般只做状语,且用逗号和句子其他成分隔开,且前后主语不一致,逗号前后两个成分,后部分句首并没有并列连词and/so等,前部分也没有because等,说明这是一个简单句,而逗号前面只是一个状语,而不是一个并列句/复合句。如果是并列句,则句子应该写成:All flights had been canceled because of the snowstorm,so we decided to take the train.如果是复合句,则句子应该写成:Because all flights had been canceled because of the snowstorm,we decided to take the train.由此可以排除使用两句的选项AB,

因为它们都是一个句子的谓语结构;而all flights和cancel之间明显是被动关系,而C则也是句子的谓语结构,则它表明all flights和cancel之间为主动关系,排除.

D项是语法上的独立主格结构,该结构中的非谓语结构having been canceled的逻辑主语是其前的all flights,并非句子的主语we;它表明all flights和cancel之间为被动关系,且cancel该动作发生在谓语动词decided to...之前.

故正确答案为D选项。
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