How to tell them apart
べきだ expresses a firm judgment that something is the right or correct course of action, often carrying a moral or logical weight. ほうがいい is softer advice, recommending a choice between options for someone's benefit. Saying 真面目に勉強するべきだ sounds like a duty, while 真面目に勉強したほうがいい sounds like friendly suggestion.
- べきだ Use べきだ when stating a strong conviction about what is right or ought to be done.
- ほうがいい Use ほうがいい when giving advice or recommending a better option for someone's benefit.
| Grammar point | Meaning | JLPT level |
|---|---|---|
| べきだ bekida | is supposed to; is morally right to do | N3 |
| ほうがいい hougaii | advises that something is the better choice; ought to; would be wise to | N4 |
べきだ bekida
is supposed to; is morally right to do
べきだ expresses that an action is the right or expected thing to do, based on duty, morals, or common sense. It attaches to the dictionary form of a verb, as in 行くべきだ or 食べるべきだ, with する becoming すべきだ. Forms include べきだった for past obligation, べきではない for negative obligation, and べきである in formal writing. It sounds strong and judgmental, so it is common in rules and criticism but can sound harsh as casual advice.
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君自らが会議に出席すべきであったのだ。
You should have attended the meeting in person.
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君は彼の仕事を手伝うべきだった。
You should have helped him with his work.
ほうがいい hougaii
advises that something is the better choice; ought to; would be wise to
ほうがいい gives advice that one option is better, meaning you ought to do something or would be wise to do it. It follows the past ta form of a verb for a positive suggestion, as in 行ったほうがいい, and the nai form for a negative suggestion, as in 行かないほうがいい. Although it uses the ta form, it does not refer to the past. The tone can sound firm, so softer endings like よ or です are often added when speaking to others.
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お金をむだ使いしないほうがいい。
You had better not waste your money.
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すぐ病院に行った方がいいよ。
You should go to the hospital at once.
べきだ and ほうがいい are JLPT N4–N3 grammar points that Japanese learners often mix up. This page compares them side by side on meanings, usage and example sentences, so you can tell them apart.