the room is in the terrible mess ,it can not have been cleaned .为什么用can not have beenWith all the work on hand ,he could not have gone to the cinema last night.为什么用could not have gone 而不用 should not have gone.Eve was late for cl

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the room is in the terrible mess ,it can not have been cleaned .为什么用can not have beenWith all the work on hand ,he could not have gone to the cinema last night.为什么用could not have gone 而不用 should not have gone.Eve was late for cl
the room is in the terrible mess ,it can not have been cleaned .为什么用can not have been
With all the work on hand ,he could not have gone to the cinema last night.为什么用could not have gone 而不用 should not have gone.
Eve was late for class again ,she should have got up .为什么用should have got up而不用 must get up 如果must get up 中变成must be get up 可否
you should bear in mind that he is not so strong as he used to be 为什么用 used to be 而不用was used to be

the room is in the terrible mess ,it can not have been cleaned .为什么用can not have beenWith all the work on hand ,he could not have gone to the cinema last night.为什么用could not have gone 而不用 should not have gone.Eve was late for cl
should一般用于第一人称