〜べきだ

should / ought to

N3modality

〜べきだ expresses should / ought to — communicating the speaker's degree of certainty, judgment, or attitude about a statement. Modal expressions in Japanese range from strong conviction to vague possibility, and choosing the right one conveys important nuance about how sure you are.

This is an upper-intermediate pattern common in natural conversation and media like news, novels, and dramas.

Structure

Verb(dictionary) + べきだ

するべきだ → すべきだ also common

When to Use#

  • When giving strong advice about what someone should do
  • When expressing moral obligation or duty

When NOT to Use#

  • When a different nuance than "should / ought to" is intended — check the related patterns below

Example Sentences#

  • 若い人も地域活動に参加するべきです。 — Young people should also participate in community activities.
  • 市民として、投票の義務を果たすべきです。 — As a citizen, we should fulfill our duty to vote.
  • 住民として、地域の活動に参加するべきです。 — As a resident, I should participate in community activities.

Practice#

Try reading these sentences aloud, then check the translation and vocabulary:

N3community

Young people should also participate in community activities.

Neutral

(わか)(ひと)地域活動(ちいきかつどう)参加(さんか)するべきです。

Casual

(わか)(ひと)地域活動(ちいきかつどう)参加(さんか)するべきだ。

Vocabulary
若いyoung地域活動community activity参加するto participate
Grammar
〜べきだshould
Try in JIVX
N3community

As a citizen, we should fulfill our duty to vote.

Neutral

市民(しみん)として、投票(とうひょう)義務(ぎむ)()たすべきです。

Casual

市民(しみん)として、投票(とうひょう)義務(ぎむ)()たすべきだ。

Vocabulary
市民citizen投票voting義務duty, obligation果たすto fulfill
Grammar
〜としてas〜べきだshould
Try in JIVX

Common Mistakes#

  1. Direct translation from English — The concept expressed by 〜べきだ may not map one-to-one with its English translation. Focus on understanding the Japanese usage through example sentences rather than relying on the English gloss.

Related Patterns

Practice this grammar in JIVX

Reinforce 〜べきだ with AI-graded sentence practice and spaced repetition.

Start Practicing Free