Conditionals (ば, と, なら)
Learning Objectives
- Understand how to use the 〜ば conditional for hypothetical situations and advice.
- Use the 〜と conditional for natural consequences and inevitable results.
- Use the 〜なら conditional to react to context or offer specific advice.
- Understand the nuanced differences between たら, ば, と, and なら.
In the previous chapter, we learned that 〜たら is the most versatile conditional, handling “if/when” and sequential past discoveries. However, Japanese has three other conditionals—ば, と, and なら—that convey very specific nuances. ば is excellent for advice, と is used for inevitable facts, and なら is used to react to what someone just said. Let’s master these precise tools!
1. The ば Conditional (Hypothetical & Advice)
The 〜ば form strongly emphasizes the condition required for a particular result. It often translates to “provided that…” or “so long as…”. It is incredibly common in advice and idioms (like 〜ばいいです - “It would be good if you do…”).
Formation
- Group 1 Verbs: Change the final
usound to anesound and addば. (書く ➔ 書けば) - Group 2 Verbs: Drop
るand addれば. (食べる ➔ 食べれば) - Irregular Verbs: 来る ➔ 来れば (kureba), する ➔ すれば (sureba)
- I-Adjectives: Drop
いand addければ. (安い ➔ 安ければ) - Negative (Na-adj/Nouns): 〜でなければ
明日晴れれば、富士山が見えます。
ashita harereba, fujisan ga miemasu.
Provided it is clear tomorrow, you can see Mount Fuji.
薬を飲めば、熱が下がります。
kusuri o nomeba, netsu ga sagarimasu.
If you take the medicine, the fever will go down.
安ければ、それを買います。
yasukereba, sore o kaimasu.
If it is cheap (provided it is cheap), I will buy it.
[!WARNING] While
〜ばcan be used for general “If” statements, you cannot use verbs of will/intention/request in the second half of the sentence (the B clause) if both clauses have the same subject. For example,お金があれば、車を買いたい(If I have money, I want to buy a car) works because “having” is a state, but日本へ行けば、寿司を食べたいis unnatural. Use行ったらinstead!
2. The と Conditional (Natural Consequence)
The 〜と conditional is used for absolute, guaranteed cause-and-effect relationships. Think of it as: “Whenever A happens, B always and inevitably follows.” It is used for natural phenomena, giving directions, and machine operations.
Formation
Simply add と immediately after the dictionary form (or plain negative form) of the verb.
春になると、桜が咲きます。
haru ni naru to, sakura ga sakimasu.
When spring comes, cherry blossoms (always) bloom.
このボタンを押すと、お釣りが出ます。
kono botan o osu to, otsuri ga demasu.
Whenever you press this button, change comes out.
まっすぐ行くと、右に銀行があります。
massugu iku to, migi ni ginkou ga arimasu.
If you go straight, the bank is on the right.
[!IMPORTANT] The second half of a
〜とsentence cannot contain your personal intention, request, invitation, or command. You cannot say春になると、ピクニックに行きたい(When spring comes, I want to go on a picnic). You must use春になったら.
3. The なら Conditional (Contextual Reaction)
〜なら is used when you are reacting to context, especially something someone just said. It means “If that is the case…” or “As for [Noun]…”. It is extremely common when offering advice based on a specific topic.
Formation
Just attach なら to the plain form of the verb/adjective, or directly to a noun/na-adjective.
温泉に行くなら、箱根がいいですよ。
onsen ni iku nara, Hakone ga ii desu yo.
If you are going to a hot spring, Hakone is good.
パソコンなら、Macがおすすめです。
pasokon nara, makku ga osusume desu.
If you're talking about computers, Mac is recommended.
嫌なら、しなくてもいいです。
iya nara, shinakute mo ii desu.
If you dislike it, you don't have to do it.
Conditionals Summary Table
When in doubt, use 〜たら. But to sound like a native, know the specific use cases:
| Form | Core Meaning | Best Used For |
|---|---|---|
| たら (Tara) | If / When | Everyday “If”, sequential events, past discovery. The safest catch-all. |
| ば (Ba) | Provided that… | Focusing on the condition itself, idioms, proverbs, “It would be good if…” |
| と (To) | Whenever… | Pure facts, how machines work, nature, directions. No personal will allowed. |
| なら (Nara) | If that’s the case… | Reacting to someone’s statement, offering topical advice. |
Contextual Dialogue
Let’s see how these nuanced conditionals operate in a real conversation.
田中さん、パソコンが壊れてしまいました。
Tanaka-san, pasokon ga kowarete shimaimashita.
Tanaka-san, my computer broke down.
大変！電源ボタンを押すと、どうなりますか？
Taihen! Dengen botan o osu to, dou narimasu ka?
Oh no! If you press the power button, does anything happen?
ボタンを押しても、画面が真っ暗です。
Botan o oshite mo, gamen ga makkura desu.
Even if I press it, the screen stays completely black.
それなら、新しいのを買ったほうがいいですよ。Macなら、少しわかります。
Sore nara, atarashii no o katta hou ga ii desu yo. Makku nara, sukoshi wakarimasu.
If that's the case, you should buy a new one. If it's Macs, I know a little about them.
ありがとう。安ければ、何でもいいです。週末時間ができたら、買いに行きます。
Arigatou. Yasukereba, nandemo ii desu. Shuumatsu jikan ga dekitara, kai ni ikimasu.
Thank you. Provided it's cheap, anything is fine. If I have time this weekend, I'll go buy one.
Chapter Summary
- 1〜ば expresses 'provided that' and focuses heavily on the condition setting up the result.
- 2〜と expresses natural consequence ('whenever'). It cannot be used with personal intentions or requests.
- 3〜なら reacts to contextual information ('if that's the case') and is great for targeted advice.
- 4Each conditional has specific restrictions, whereas 〜たら is the most broadly applicable.
Knowledge Check
Test your understanding of the precise Japanese conditionals!
Quiz
Which form is used for giving street directions or explaining how a machine works?