should也是情态动词。
与ought的各种形式相同,should可用于现在时以及将来时。如位于动词过去式之后时,也可以用于过去时。在上文的各例句中should可代替ought to使用。
否定式:should not/shouldnt
疑问式:should I?等
否定疑问式:should I not?/shouldnt I?等
should后面带没有to的不定式(即动词原形)。
should和ought用于表示义务时通常意思是同样的,但should 是较为常用的形式。
在会话中 should/ought to常可单独使用,此时动词不定式省略而不说出:
You should paint/ought to paint your door.
Yes,I know I should/I know I ought to.
你应当油漆下你的门。
对,我知道我该这样做。
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