It's vital that he speak to the registrar as soon as possible.此句中为什么是speak不是speaks?
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It's vital that he speak to the registrar as soon as possible.此句中为什么是speak不是speaks?
It's vital that he speak to the registrar as soon as possible.此句中为什么是speak不是speaks?
It's vital that he speak to the registrar as soon as possible.此句中为什么是speak不是speaks?
因为 前面句子中有 vital 后面要用虚拟语气,即:
It's vital that 主语 + (should) do should 可以省略
类似用法还有:
在It is (was)important (necessary,desirable,imperative,advisable,incredible,urgent,possible,essential,natural,preferable,insistent,crucial,better,best,ridiculous,vital) that…
及It is (was) a pity (shame,wonder,must,suggestion,proposal,requirement,request,desire,order,recommendation) that….,It is (was)desired (arranged,decided,ordered,proposed,requested,recommended,suggested,settled) that…等句型的主语从句中,其谓语用“should+动词原形(其中should可以省略)”来构成虚拟语气.
例:It is important that we (should)speak politely.
我们说话要有礼貌,这是很重要的.
It is vital that ... 从句用should+动词原型(有时可省略should)的虚拟语气此句是省略了should的虚拟语气,故只能用speak, 不能用speaks.