2008年10月SAT一道语法题求解释!改进句子的(If there had been) a power failure,the hospital will run on electricity from its own generators,which can operate for 200 hours.A.If there had beenB.If there wereC.Had there beenD.Should there b

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2008年10月SAT一道语法题求解释!改进句子的(If there had been) a power failure,the hospital will run on electricity from its own generators,which can operate for 200 hours.A.If there had beenB.If there wereC.Had there beenD.Should there b

2008年10月SAT一道语法题求解释!改进句子的(If there had been) a power failure,the hospital will run on electricity from its own generators,which can operate for 200 hours.A.If there had beenB.If there wereC.Had there beenD.Should there b
2008年10月SAT一道语法题求解释!
改进句子的
(If there had been) a power failure,the hospital will run on electricity from its own generators,which can operate for 200 hours.
A.If there had been
B.If there were
C.Had there been
D.Should there be
E.There has been
D是正确答案我能懂,但是为什么B不对?虚拟语气对未来表推测不是可以用If+主语+were的么?T

2008年10月SAT一道语法题求解释!改进句子的(If there had been) a power failure,the hospital will run on electricity from its own generators,which can operate for 200 hours.A.If there had beenB.If there wereC.Had there beenD.Should there b
如果是虚拟语气对将来的推测,条件句时态没错,主句,要用would加动词原形,他用的是will

如果选B那后面will就应该换成would 唉 晚了一步

拟语

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