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独立主格结构什么时候用完成时?如这个题:Allflightsbecauseofthesnowstorm,manypassengerscoulddonothingbuttakethetrain.A)hadbeencanceledB)havebeencanceledC)werecanceledD)havingbeencanceled因为
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独立主格结构什么时候用完成时?
如这个题:
All flights ______ because of the snowstorm,many passengers could do nothing but take the train.
A)had been canceled B)have been canceled
C)were canceled D)having been canceled
因为风雪,所有航班都被取消,许多旅客别无它法,只得乘火车.(D)
All things ______,the planned trip will have to be called off.
A)considered B)be considered
C)considering D)having considered
考虑了方方面面之后,原来计划好的旅行不得不取消了.(A)
为什么前者要用完成时而后者不用?
如这个题:
All flights ______ because of the snowstorm,many passengers could do nothing but take the train.
A)had been canceled B)have been canceled
C)were canceled D)having been canceled
因为风雪,所有航班都被取消,许多旅客别无它法,只得乘火车.(D)
All things ______,the planned trip will have to be called off.
A)considered B)be considered
C)considering D)having considered
考虑了方方面面之后,原来计划好的旅行不得不取消了.(A)
为什么前者要用完成时而后者不用?
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答案和解析
第一,当从句的谓语发生的动作给主句造成一定的影响,有了一个结果.如:第一道题可改写成:Many passengers could do nothing but take the train because all flights has been canceled.第二,当从句的动作先于主句的...
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