はずだ (hazu-da) vs べきだ (beki-da)
What's the Difference?
Quick Answer
Use はずだ for expected outcomes and べきだ for moral obligations or advice.
Side-by-Side Comparison
| Aspect | はずだ (hazu-da) | べきだ (beki-da) |
|---|---|---|
| JLPT | N3 | N3 |
| Formality | neutral | neutral |
| Expectation vs Obligation | Expresses an expected situation or outcome. | Indicates a moral obligation or something that should be done. |
| Certainty | Often implies a higher degree of certainty. | Can imply a sense of ideal or recommendation. |
| Reasoning | Based on logical reasoning or prior knowledge. | Based on moral or social norms. |
はずだ (hazu-da)
JLPT: N3 | Formality: neutral
- Expectation vs Obligation: Expresses an expected situation or outcome.
- Certainty: Often implies a higher degree of certainty.
- Reasoning: Based on logical reasoning or prior knowledge.
べきだ (beki-da)
JLPT: N3 | Formality: neutral
- Expectation vs Obligation: Indicates a moral obligation or something that should be done.
- Certainty: Can imply a sense of ideal or recommendation.
- Reasoning: Based on moral or social norms.
Example Sentences
はずだ (hazu-da)
雨が降ってくるはずだ
ame ga futte kuru hazu da
It's expected to rain.
彼は日本語を話すはずだ
kare wa nihongo o hanasu hazu da
He is expected to speak Japanese.
明日は休みの日はずだ
ashita wa yasumi no hi hazu da
Tomorrow is expected to be a day off.
べきだ (beki-da)
健康のためには毎日運動するべきだ
kenkō no tame ni wa mainichi undō suru beki da
For health, one should exercise every day.
彼は謝るべきだ
kare wa ayamaru beki da
He should apologize.
社会人のためには時間を守るべきだ
shakaijin no tame ni wa jikan o mamoru beki da
For a member of society, one should keep to the schedule.
Common Mistakes
- ⚠ Using はずだ for giving advice, which is more appropriately done with べきだ.
- ⚠ Confusing the levels of certainty and obligation implied by each term.
- ⚠ Using べきだ to express an expected outcome, which is more suitable for はずだ.
Memory Tip
💡 Associate はずだ with 'has to be' for expected situations and べきだ with 'ought to be' for moral or social obligations.
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