JLPT N3 grammar
The ば restriction — Meaning & Examples
If the ば-clause is an ACTION verb, you cannot follow it with a request, command or intention — use たら instead. Fine with states: 安ければ, 分からなければ, できれば.
The ば Restriction
Here is a rule most textbooks skip, and the JLPT loves.
If the ば-clause is an ACTION verb, you cannot follow it with a request, command, invitation or statement of intention.
❌ 東京に行けば、連絡してください。
✅ 東京に行ったら、連絡してください。
= When you go to Tokyo, please get in touch.
❌ 時間があれば、手伝ってください。 (borderline — many speakers avoid it)
✅ 時間があったら、手伝ってください。
But it's fine when the ば-clause is a STATE — an adjective, a potential form, or ある/いる:
✅ 安ければ、買ってください。 = If it's cheap, please buy it. (adjective)
✅ 分からなければ、聞いてください。 = If you don't understand, please ask. (negative state)
✅ できれば、来てください。 = If possible, please come. (potential)
できれば is worth memorising on its own — "if possible" — one of the most useful softeners in polite Japanese.
The safe habit: if the second clause contains ください, ましょう, つもり or たい, reach for たら unless the first clause is clearly a state. ⚖️
Practice questions
Try these 2 questions on The ば restriction. Pick an answer in your head, then open “Show answer”.
1. Why is 東京に行けば、連絡してください ungrammatical?
- 行く cannot take ば
- An ACTION-verb ば-clause cannot be followed by a request — use たら
- It needs the past tense
- 連絡 requires を
Show answer
Answer: An ACTION-verb ば-clause cannot be followed by a request — use たら
The ば restriction: if the ば-clause is an action verb, no request/command/intention may follow. 東京に行ったら、連絡してください.
2. できれば、来てください means?
- You must come
- You do not have to come
- When you can come, tell me
- If possible, please come
Show answer
Answer: If possible, please come
できれば = if possible — a potential form, so the ば restriction does not apply. One of the most useful softeners in polite Japanese.
Practise The ば restriction in the free app
This point is part of the “Conditionals, Level 2 — さえ〜ば・ば〜ほど・としたら” lesson in A Star Japanese. Study it with examples, a quiz, flashcards and timed JLPT N3 mock exams. Free on iPhone and Android.
Free on iPhone and Android · No ads
Related N3 grammar points
From the same lesson: Conditionals, Level 2 — さえ〜ば・ば〜ほど・としたら
Frequently asked questions
What does The ば restriction mean?
If the ば-clause is an ACTION verb, you cannot follow it with a request, command or intention — use たら instead. Fine with states: 安ければ, 分からなければ, できれば.
Is The ば restriction on the JLPT N3 test?
The ば restriction is taught in the JLPT N3 grammar course in A Star Japanese (lesson “Conditionals, Level 2 — さえ〜ば・ば〜ほど・としたら”), so it is a pattern learners at this level are expected to recognise. The JLPT does not publish an official grammar list, so treat this as a study guide rather than an official requirement.
How can I practise The ば restriction?
Open the “Conditionals, Level 2 — さえ〜ば・ば〜ほど・としたら” lesson in the free A Star Japanese app for iPhone and Android. It has examples, a quiz after every lesson, flashcards with spaced repetition and timed JLPT N3 mock exams, with no ads.