Hypothetical condition with 〜ば

Usage Notes

For godan verbs, shift the final sound to the え row and add ば (読(よ)む → 読(よ)めば). Ichidan verbs drop る and add れば (見(み)る → 見(み)れば). い-adjectives drop い and add ければ (高(たか)い → 高(たか)ければ); いい becomes よければ. する becomes すれば, and 来(く)る becomes 来(く)れば. Negatives replace ない with なければ. Nouns and な-adjectives use なら, the conditional form of だ (ならば in full), or であれば in more formal speech.

ば often focuses on what condition would produce a result. That makes it natural in どうすれば “what should I do”, advice with ばいい, and regrets with ばよかった.

When the ば clause describes an action, the main clause usually can’t be a request, command, invitation, or statement of intent. Say 駅(えき)に着(つ)いたら電話(でんわ)してください, not 駅(えき)に着(つ)けば. When the ば clause describes a state (ある, いる, adjectives, potential verbs, negatives), these are fine: 分(わ)からなければ電話(でんわ)してください.

ば is not normally used to narrate a single past event. With a past-tense main clause, it describes something that didn’t happen (もっと早(はや)く来(く)れば間(ま)に合(あ)ったのに, “if I’d come earlier, I’d have made it”) or something that always happened.

In casual speech, れば often becomes りゃ and なければ becomes なけりゃ or なきゃ. How casual contractions work covers these. Set phrases built on ば, such as によれば “according to” and ば〜ほど “the more… the more”, have their own pages.

Formation

What It Takes

ば names a condition and what follows from it. Often the speaker wants the result, and the ば clause says what it would take to get there.

Example 1 of 2: Might appear bigger with 〜かもしれない

Example 1 of 2

Due to Chino’s concerns about her height, Rize suggests a solution.

リゼ:

「声(こえ)が大(おお)きければ存在(そんざい)も大(おお)きく見(み)えるかもしれない」

“If your voice is loud, your presence might seem bigger too.”

チノ:

「錯覚(さっかく)ですか」

“An optical illusion?”

View Full Example

Chino worries about being small. Rize names a condition that might help: if her voice is loud, her presence might seem bigger. かもしれない keeps the result uncertain.

Example 2 of 2: Keeping still while her ribbon dries with 〜間

Example 2 of 2

Kyouko’s ribbon needs to be washed. Since she is a jiāngshī (vampire), she will uncontrollably attack people to drink their blood when her ribbon is removed. For this reason, her brother tries to tie her up with a rope. Kyouko hides in the bathroom, then sneaks out the window only to find Kenji waiting outside.

ケンジ:

「干(ほ)してる間(あいだ)じっとしてればすぐ済(す)むだろ。」

“While it's drying, if you'd just keep still it'd be over soon.”

ケンジ:

「なんで毎回(まいかい)そんなにイヤがる！！」

“Why do you seem to hate it so much every time?!”

View Full Example

Kenji tells Kyouko that all she has to do is keep still while the ribbon dries. してれば is casual for していれば.

If Not with 〜なければ

なければ means “if not”. It often warns what will happen unless something is done. じゃなきゃ, from じゃなければ (ではなければ), works like “otherwise”.

Example 1 of 2: Deactivating a bomb with 解除

Example 1 of 2

A shop owner tells the Colors trio that he’s crafted a bomb.

おやじ:

「解除(かいじょ)しなければこの街(まち)はドカンだ」

“If you don't deactivate it, this district will go kaboom!”

View Full Example

The shop owner claims he’s built a bomb. If the girls don’t defuse it, the town goes boom.

Example 2 of 2: Singing one song after another with 連続

Example 2 of 2

To distract himself from things going on with Fujimiya, Hase goes to karaoke, bringing Shougo with him.

長谷(はせ):

「ほらほら将吾(しょうご)も何(なに)か入(い)れて！」

“Come on, come on, Shougo! Put something in, too!”

「じゃなきゃ俺(おれ)が連続(れんぞく)で歌(うた)っちゃうぞー！」

“Otherwise, I'll just keep singing one after another!”

View Full Example

Hase wants Shougo to pick a karaoke song. じゃなきゃ means “otherwise” (literally “if not”), so the threat is that Hase will sing song after song himself.

Asking What to Do with どうすれば

どうすれば is a common way to ask what’s needed: “what should I do?” It often continues with いい. どうしたら works too.

Just Do This with 〜ばいい

ばいい presents the needed action as simple and enough on its own: “you can just…” or “all I have to do is…”.

Urushi prepared chocolate to give Ayumu for Valentine’s Day but is too nervous to give it to him. After the two play shogi during their club, Ayumu turns away from Urushi as he puts the shogi table away.

うるし:

「今(いま)。歩(あゆむ)が　後(うし)ろ向(む)いてる間(あいだ)にかばんに入(い)れればいいじゃん！！」

“Now! While Ayumu's back is turned, I can just put it into his satchel!”

View Full Example

Urushi is too nervous to hand Ayumu her Valentine’s chocolate. She hits on an easy way out: she can just slip it into his bag while his back is turned.

Requests and Wishes After a State

When the ば clause describes a state, such as できる “can”, ある, or an adjective, the main clause can be a request or wish. できれば, “if possible”, softens a request this way.

Takako and Azu tell their teacher they want to participate in the sports day relay race. The teacher points out that participants have already been decided, then one of the decided participants chimes in.

生徒(せいと):

「私(わたし)もクラス代表(だいひょう)はちょっと荷(に)が重(おも)いなと思(おも)っていたので…」

“I was also thinking I have too much on my plate as class representative.”

「できれば代(か)わってもらえたら嬉(うれ)しいです」

“If possible, I'd be happy if someone could take my place.”

View Full Example

One of the students already picked for the relay speaks up. できれば, a set phrase for “if possible”, uses the potential できる, a state, so it can come before a request. The request itself is softened with たら and 嬉(うれ)しいです.

Regrets and Complaints

With よかった, ば looks back at something that didn’t happen: “should have”. Aimed at someone else, it says what they should have done, which can sound critical. ばいいのに and ばいいものを complain that things aren’t the way the speaker wants. In a complaint, a ば clause left trailing can mean “if only”.

Example 1 of 3: Because her teaching method is unreliable with 〜ので

Example 1 of 3

At a library study session, Syaro is astonished to learn Cocoa’s the one tutoring Chiya.

シャロ:

「それならココアがチノちゃんに教(おし)えてあげればよかったんじゃない？」

“Then shouldn't you have taught Chino yourself, Cocoa?”

チノ:

「ココアさんは教(おし)え方(かた)がアレなので頼(たよ)りになりません」

“Cocoa is unreliable because of her method of teaching.”

View Full Example

At a study session, Syaro asks whether Cocoa should have been the one to teach Chino. あげればよかったんじゃない？ is “wouldn’t it have been better if you’d taught her?” It’s about Cocoa’s choice, not Syaro’s own regret: a hindsight suggestion, framed as a question with んじゃない？.

Example 2 of 3: Demolishing the movie theater with 解体

Example 2 of 3

Conan and his friends go to the theater to see a movie. There, they discover this is the last day before the theater closes.

コナン:

「そっか！それで場内(じょうない)にロープとかが落(お)ちてたんだね！」

“Oh, I see! That's why there were ropes and stuff lying around the venue!”

オーナー:

「スマンのう…　業者(ぎょうしゃ)の者(もの)が上映(じょうえい)時間(じかん)ギリギリまで解体(かいたい)作業(さぎょう)の準備(じゅんび)をしとったから…」

“Sorry about that... The contractor's crew was rushing to get the dismantling ready right up until showtime...”

スタッフ:

「まったく…　明日(あした)まで待(ま)ってくれればいいものを…」

“Honestly... They could've at least waited until tomorrow...”

View Full Example

On the theater’s last day, the contractors were preparing the demolition right up until showtime. The staff member grumbles that they could have waited until tomorrow. ものを adds the complaint: they didn’t.

Example 3 of 3: Bus pickup and drop off with 送迎

Example 3 of 3

After school, the girls’ basketball team walks to the location where they’re practicing for an upcoming match.

生徒:

「せめてバスで送迎(そうげい)してくれれば…」

“If only they'd at least provide a bus to pick us up and drop us off”

生徒:

「徒歩(とほ)圏内(けんない)だからねぇ」

“It's within walking distance, after all.”

View Full Example

The team has to walk to practice. The ば clause trails off, leaving out something like いいのに: “if only they’d at least send a bus”.

Related Grammar

• Natural result with 〜と
  • と gives an automatic result; ば frames what's required for an outcome.
• If and when with 〜たら
  • たら works before requests and plans, and for one-time past events. ば focuses on what's needed for the result.
• If that's the case with なら
  • なら builds on something already raised in conversation.
• Proportional to with 〜ば〜ほど
  • ば〜ほど reuses this form to say "the more A, the more B".
• Must do with 〜なければならない
  • Obligation grammar built directly on the ば conditional.