Introduction: Mastering Japanese Conditionals and Temporal Clauses
Welcome to one of the most important grammar chapters for Pearson Edexcel A Level Japanese (9JA0)! In English, we use words like "if", "when", or "in the case of" quite flexibly. However, Japanese uses several distinct structures depending on whether a consequence is inevitable, provisional, sequential, or based on context.
Mastering these structures directly supports Assessment Objective 3 (AO3): Manipulating the language accurately, using a range of lexis and structure. You will rely on these heavily in Paper 2 (Translation into Japanese) and Paper 3 (Writing / Research Task).
Don't worry if distinguishing between these forms seems tricky at first! We will break them down into easy rules, formulas, and examiner tips so you can choose the right conditional every time.
---The "Big Four" Conditionals
Japanese has four primary ways to say "if" or "when": と, ば, たら, and なら. Let's look at how each one works.
1. と (To) – Natural and Inevitable Consequences
Core Logic: "Whenever A happens, B inevitably follows." Think of this as a natural law, a mechanical reaction, or following direct street directions.
Formation:
• [Dictionary Form Verb] + と
• [i-Adjective] + と
Examples:
• 春になると、花が咲きます。 (Haru ni naru to, hana ga sakimasu. — When spring comes, flowers bloom.)
• このボタンを押すと、ドアが開きます。 (Kono botan o osu to, doa ga akimasu. — If/When you press this button, the door opens.)
CRITICAL EXAM RULE: The second clause after と cannot be a command, request, suggestion, or expression of personal intention/volition (such as ~te kudasai, ~mashō, or ~tai). It must describe an objective outcome.
2. ば (Ba) – The Provisional "If and Only If"
Core Logic: "If condition A is met, then B is possible or true." It places strong focus on the condition itself. It is also used for general truths and hypothetical or counterfactual ("If I were...") statements.
Formation:
• Group 1 & 2 Verbs: Change final -u vowel to -e and add ば (e.g., 行く \(\rightarrow\) 行けば, 食べる \(\rightarrow\) 食べれば).
• Irregular Verbs: する \(\rightarrow\) すれば; くる \(\rightarrow\) くれば.
• i-Adjectives: Drop final い and add ければ (e.g., 安い \(\rightarrow\) 安ければ, いい \(\rightarrow\) よければ).
• na-Adjectives & Nouns: Add であれば or なら(ば).
Example:
• 薬を飲めば、よくなります。 (Kusuri o nomeba, yoku narimasu. — If you take medicine, you will get better.)
Examiner Note: Like と, when the condition involves an action verb, ば cannot normally be followed by requests or commands.
3. たら (Tara) – The Sequential and Versatile "If/Once"
Core Logic: "When/If A is completed, then B happens." This is the most versatile conditional in Japanese. It focuses on the completion of the first action before the second occurs.
Formation:
• [Plain Past / Ta-form] + ら
• Verbs: 食べた \(\rightarrow\) 食べたら; 行った \(\rightarrow\) 行ったら
• i-Adjectives: 安かった \(\rightarrow\) 安かったら
• na-Adjectives / Nouns: 静かだった \(\rightarrow\) 静かだったら; 雨だった \(\rightarrow\) 雨だったら
Examples:
• 家に帰ったら、電話をしてください。 (Ie ni kaettara, denwa o shite kudasai. — When/Once you return home, please call me.)
• 時間があったら、映画を見に行きたいです。 (Jikan ga attara, eiga o mi ni ikitai desu. — If I have time, I want to go see a movie.)
Key Advantage: たら fully allows volitional endings (requests, invitations, desires, commands) in the main clause.
4. なら (Nara) – The Contextual "If it's the case that..."
Core Logic: "If you are talking about A..." or "If it is true that A...". It is based on information, context, or a premise introduced by someone else, and is frequently used to offer advice, suggestions, or evaluations.
Formation:
• [Noun / na-Adjective base] + なら
• [Plain Form Verb / i-Adjective] + なら
Examples:
• 日本へ行くなら、京都に行ったほうがいいですよ。 (Nihon e iku nara, Kyōto ni itta hō ga ii desu yo. — If it's the case that you are going to Japan, you should visit Kyoto.)
• お茶なら、緑茶が好きです。 (Ocha nara, ryokucha ga suki desu. — If we are talking about tea, I like green tea.)
Summary Table: The Big Four
• と: Natural / inevitable consequence. Formula: [Dict. Form] + と. No volitional main clause.
• ば: Provisional condition / general truths / hypothetical. Formula: [e-stem] + ば / ~ければ.
• たら: Sequential ("once completed") / general "if". Formula: [Ta-form] + ら. Accepts volitional endings.
• なら: Contextual premise / advice. Formula: [Noun / Plain Form] + なら.
Temporal Clauses: とき and 場合
In addition to conditionals, Edexcel A Level Japanese requires precise control of temporal structures expressing time and specific circumstances.
1. とき (Toki) – "When / At the time of"
Core Logic: Pinpoints the specific time-frame in which an action, state, or event occurs.
Formation:
• [Plain Form Verb / i-Adj] + とき
• [na-Adj] + な + とき
• [Noun] + の + とき
Tense Rule Before とき:
• Dictionary Form + とき: The action before toki is not yet completed when the second action happens.
Example: 日本へ行くとき、カメラを買いました。 (Bought the camera before going to Japan / on the way).
• Ta-form (Past) + とき: The action before toki is already completed when the second action happens.
Example: 日本へ行ったとき、カメラを買いました。 (Bought the camera after arriving in Japan).
2. 場合 (Baai) – "In the case of / In the event that"
Core Logic: Used for formal, hypothetical contingencies, instructions, or official situations (e.g., emergencies, rules, business conditions).
Formation:
• [Plain Form Verb / i-Adj] + 場合(は)
• [na-Adj] + な + 場合(は)
• [Noun] + の + 場合(は)
Examples:
• 火事の場合は、エレベーターを使わないでください。 (Kaji no baai wa, erebētā o tsukawanaide kudasai. — In the event of a fire, please do not use the elevator.)
• パスワードを忘れた場合は、こちらに連絡してください。 (Pasuwādo o wasureta baai wa, kochira ni renraku shite kudasai. — In the case that you have forgotten your password, please contact us here.)
Style Tip for Paper 3: Using 場合 or ば in your research writing demonstrates a formal, academic register suitable for advanced essays.
---Examiner Pitfalls and Common Mistakes
1. The "Volition" Error in Translations (Paper 2)
Examiners frequently report students writing sentences such as:
Incorrect: 日本に行くと、連絡してください。
Correct: 日本に行ったら、連絡してください。
Why? と cannot precede requests or personal intentions (~kudasai, ~mashō, ~tai). Always use たら when the main clause contains a request or personal decision!
2. Conjugation Errors with ば
• For i-adjectives, remember to change ~i to ~ければ (e.g., 高い \(\rightarrow\) 高ければ, not 高いば).
• For na-adjectives, do not attach ba directly; use ~であれば or なら (e.g., 便利 \(\rightarrow\) 便利であれば).
3. Misusing とき instead of たら
If you want to say "Once A is done, do B", use たら, not とき.
• とき describes the simultaneous or general time period.
• たら establishes a sequence: step A finishes first, then step B takes place.
4. Expressing Counterfactuals ("If I were...")
For hypothetical situations that are not true (counterfactuals), use ば or たら (e.g., Jikan ga areba... / Jikan ga attara...).
Quick Review and Checklist
• Need an inevitable result or directions? Use と.
• Need a provisional "if and only if" condition or formal essay structure? Use ば.
• Giving a command, request, or expressing desire after an action completes? Use たら.
• Responding to context or giving advice based on a topic? Use なら.
• Referring to a time frame? Use とき (check your tense before toki!).
• Describing official contingencies or formal situations? Use 場合.