怎么分别would、should是情态动词,还是助动词啊?这两个词还有什么用法?在虚拟语气中算什么词?

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• 怎么分别would、should是情态动词,还是助动词啊?这两个词还有什么用法?在虚拟语气中算什么词?
• 怎么分别would、should是情态动词,还是助动词啊?这两个词还有什么用法?在虚拟语气中算什么词?
• 如图，质量为0.5kg的小杯里盛有1kg的水，用绳子系住小杯在竖直平面内做“水流星”表演，转动半径为1m，小杯通过最高点的速度为4m/s，g取10m/s2．求： （1）在最高点时，绳的拉力？ （2）在
• 英语语法 虚拟语气：非真实条件句.should 是什么?第一个should + have + doneYou should have seen his face.(原句)这句是省略了从句,没错吧.If the steamer should have left port at noon,it will be passing through the canal now.（原句）不应该是:If the steamer had left port at noon,it would have been passing through the canal.或者：If the steamer left port at noon,it will be passing through the canal now.请指教上两句对吗?原句中的should have 那么最上头那句也不理解了.第二个 should + beIf you should see Celia,give her my best wishes.(原