what should we do to water?还是 what will we do to water?

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/09 19:46:34

从语法上说,两个句子都是可以的,可是含义不一样.
可是should表示“应该”,本身有“必须”“须要”的意思在里面；
而will表示的只是一种即将发生的事情,而在肯定句中还可以表示一种意愿.
这些都是情态动词/助动词用如何运用的问题.举个例子吧,比如must,may,can的用法也不同.
比如It must be him.和It may be him.都是说得通,语法上都没问题,可是must表示肯定,may表示可能.can在表示猜测的可能性是一般用于否定句,因为在肯定句中,它的肯定性太弱.
举一反三吧.

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