Usage patterns 〈 動どう 詞し 〉 べきだ one should do 〈verb〉
〈 動どう 詞し 〉 べきではない one should not do 〈verb〉
You shouldn't believe what he says.
〈 動どう 詞し 〉 べきだった should have done 〈verb〉 (expressing regret)
I should have said it sooner.
すべき 〈 事こと 〉 the thing that should be done
Let's think about what we should do now.
Related words· 6 はず expresses a logical expectation based on evidence or reasoning, while べき expresses a moral or social obligation.
なければならない is a stronger, more direct expression of obligation implying no real choice, while べき is a recommendation or duty that allows some judgment.
べき expresses a stronger sense of duty or obligation, while 方がいい offers softer, benefit-based advice.
べき is the standard modern equivalent of べし for expressing obligation, while べし is archaic/literary and mainly found in set phrases or classical texts.
Show 2 more Show fewer べき expresses that something should or ought to be done based on judgment or duty, whereas でなければならない more directly states that a certain identity or condition is required.
べき expresses what one should do as a moral or logical judgment, whereas ならない (as なければならない ) states a more direct, unavoidable necessity or obligation.
Etymology Derived from the classical auxiliary べし , which expressed obligation, expectation, or suitability. The modern form べき is the attributive form that became the base for contemporary usage.
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