Lesson 84 of 126

The lesson

8.10 〜べき — should / ought to

AI-generated

Overview

Learn to express strong obligation or moral expectation using べき ("should / ought to"), which sounds more objective and judgmental than the softer advice form ほうがいい.

~べき is used to express strong advice, moral obligation, or what is considered correct or expected. It sounds more objective and judgmental than ~ほうがいい.

Structure

  • Verb (dictionary form) + べき + だ / です
    • Exception: する → す(る)べき
  • い-adjective: remove い + くある + べき + だ / です
  • な-adjective + である + べき + だ / です
You should not say such a thing.

Tone and usage

~べき is used when the speaker presents something as:

  • Socially or morally correct
  • Logically necessary
  • Expected behavior

Because of this, it can sound strong, authoritative, or critical.

~べき vs ~ほうがいい

ExpressionStrengthNuance
~ほうがいいSoftFriendly advice
~べきStrongJudgment / obligation
You should go to bed early.
You ought to go to bed early.

Points to keep in mind

  • ~べき expresses strong “should”
  • More forceful than ~ほうがいい

Dialogue

No matter the situation, people should keep their promises. If you cannot keep one, you should contact the other person as soon as possible. I also think that in work, deadlines should always be met. When you make a mistake, you should honestly apologize. There are times when I later regret things and think, "I should not have said that." In public spaces, I think you ought not to cause trouble for others. For children, adults should behave responsibly. For the sake of health, even though I know I should rest more, I sometimes end up prioritizing work. I feel that the more important something is, the less it should be put off. I keep telling myself that I should properly act on what I believe to be right.

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