Conditionnel Zéro: Faits et Instructions
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instructions claires.
Grammar Rule in 30 Seconds
The Zero Conditional expresses facts, scientific laws, and habits that are always true when a specific condition is met.
- Use Present Simple in both clauses: 'If you heat ice, it melts.'
- Use 'when' instead of 'if' for things that happen regularly: 'When it rains, the grass gets wet.'
- Use a comma only if the 'if' clause comes first: 'If it rains, I stay home.'
Overview
How This Grammar Works
Present Simple. Nous n'avons pas besoin de will ou might car il n'y a pas d'incertitude. Vous pouvez souvent remplacer if par when sans changer le sens.
Formation Pattern
If ou When pour introduire la condition.
Present Simple.
if est en premier.
Present Simple.
When To Use It
Common Mistakes
will. Les gens disent souvent : « If you heat water, it will boil ». Cela donne l'impression d'un événement futur spécifique. Pour une vérité générale, restez simple : « It boils ».Contrast With Similar Patterns
Quick FAQ
when au lieu de if ? R : Oui ! Pour le conditionnel zéro, ils sont généralement interchangeables.Zero Conditional Structure
| Clause Type | Conjunction | Subject | Verb Tense | Example |
|---|---|---|---|---|
|
Condition Clause
|
If / When
|
You
|
Present Simple
|
If you heat ice,
|
|
Result Clause
|
(None)
|
It
|
Present Simple
|
it melts.
|
|
Negative Condition
|
If
|
You
|
Present Simple (Neg)
|
If you don't eat,
|
|
Negative Result
|
(None)
|
You
|
Present Simple (Neg)
|
you don't grow.
|
|
Question Form
|
If
|
You
|
Present Simple
|
Do you get sick if you eat nuts?
|
Common Contractions in Zero Conditional
| Full Form | Contraction | Usage Example |
|---|---|---|
|
do not
|
don't
|
If you don't study, you fail.
|
|
does not
|
doesn't
|
If it doesn't rain, plants die.
|
|
I am
|
I'm
|
If I'm late, I call.
|
|
it is
|
it's
|
If it's hot, I swim.
|
Meanings
A grammatical structure used to talk about general truths, scientific facts, or things that are always certain to happen under specific conditions.
Scientific Facts
Describing laws of nature or scientific certainties.
“If water reaches 100 degrees, it boils.”
“If you freeze water, it becomes a solid.”
Habits and Routines
Describing personal rules or automatic reactions to situations.
“If I wake up late, I miss the bus.”
“When I'm tired, I drink coffee.”
Instructions and Commands
Giving orders or advice based on a specific condition.
“If the alarm rings, leave the building immediately.”
“Call me if you need help.”
Reference Table
| Condition (clause 'If/When') | Résultat (clause principale) | Type d'affirmation |
|---|---|---|
|
If you heat metal,
|
it expands.
|
Fait scientifique
|
|
When I exercise,
|
I feel better.
|
Vérité personnelle/Habitude
|
|
If the battery runs low,
|
recharge your phone.
|
Instruction/Règle
|
|
When it's cold,
|
water freezes.
|
Phénomène naturel
|
|
If you don't save,
|
you lose your work.
|
Conséquence/Règle
|
|
When he gets bored,
|
he scrolls TikTok.
|
Habitude/Routine
|
|
If you mix primary colors,
|
you create secondary colors.
|
Vérité générale
|
|
When the traffic light is red,
|
you stop.
|
Règle/Instruction
|
Spectre de formalité
If one consumes caffeine late in the evening, sleep is often elusive. (Health advice)
If you drink coffee late at night, you don't sleep well. (Health advice)
Drink coffee late, you don't sleep. (Health advice)
Late coffee = no sleep. (Health advice)
Conditionnel Zéro : Faits & Instructions
Structure
- If / When + Présent Simple Clause de condition
- Présent Simple Clause de résultat
- Virgule Utilisée si la clause 'If/When' est en premier
Utilisations
- Faits scientifiques Ex: If you heat water to 100°C, it boils.
- Vérités universelles Ex: When the sun sets, it gets dark.
- Instructions / Règles Ex: If you want coffee, press this button.
- Habitudes / Routines Ex: If I wake up early, I go for a run.
Idée clé
- Certitude La cause mène toujours au même effet.
- Interchangeable 'If' et 'When' ont souvent le même sens.
Comparaison : Conditionnel Zéro vs Premier Conditionnel
Est-ce un Conditionnel Zéro ?
L'affirmation décrit-elle quelque chose qui EST TOUJOURS VRAI ou une instruction qui donne TOUJOURS le même résultat ?
La clause de résultat exprime-t-elle un résultat défini ou un ordre général ?
Évites-tu 'will' ou 'would' dans les deux clauses (sauf si c'est un modal pour une instruction polie) ?
Scénarios du Conditionnel Zéro
Faits
- • If you mix red and yellow, you get orange.
- • When you freeze water, it expands.
- • If you drop something, it falls.
Instructions
- • If you want to log in, enter your username.
- • When the light turns green, go.
- • If you have questions, ask a teacher.
Routines
- • If I feel stressed, I listen to music.
- • When my alarm rings, I wake up.
- • If they win, they celebrate loudly.
Conséquences
- • If you don't study, you fail.
- • When it rains, the roads get slippery.
- • If you eat too much, you gain weight.
Exemples par niveau
If you heat ice, it melts.
If you heat ice, it melts.
If I am tired, I sleep.
If I am tired, I sleep.
If it rains, the grass is wet.
If it rains, the grass is wet.
If you are hungry, eat an apple.
If you are hungry, eat an apple.
When it rains, I stay at home.
When it rains, I stay at home.
If you don't eat, you get thin.
If you don't eat, you get thin.
Does water boil if you heat it to 100 degrees?
Does water boil if you heat it to 100 degrees?
If my mom cooks, the food is great.
If my mom cooks, the food is great.
If you mix red and white, you get pink.
If you mix red and white, you get pink.
If the phone rings, don't answer it.
If the phone rings, don't answer it.
Plants die if they don't get enough sunlight.
Plants die if they don't get enough sunlight.
If you travel by bus, it takes much longer.
If you travel by bus, it takes much longer.
If a substance is denser than water, it sinks.
If a substance is denser than water, it sinks.
Whenever the economy slows down, unemployment rises.
Whenever the economy slows down, unemployment rises.
If you exercise regularly, your heart rate decreases.
If you exercise regularly, your heart rate decreases.
If the software crashes, the unsaved data is lost.
If the software crashes, the unsaved data is lost.
If the temperature drops below zero, the pipes are at risk of bursting.
If the temperature drops below zero, the pipes are at risk of bursting.
If one lacks discipline, success remains elusive.
If one lacks discipline, success remains elusive.
If the court finds the defendant guilty, a sentence is passed immediately.
If the court finds the defendant guilty, a sentence is passed immediately.
If a language is not spoken, it eventually becomes extinct.
If a language is not spoken, it eventually becomes extinct.
If the fundamental laws of physics are constant, then entropy invariably increases.
If the fundamental laws of physics are constant, then entropy invariably increases.
If a society neglects its youth, it sows the seeds of its own destruction.
If a society neglects its youth, it sows the seeds of its own destruction.
If the narrative lacks a coherent structure, the reader's engagement diminishes.
If the narrative lacks a coherent structure, the reader's engagement diminishes.
If an organism fails to adapt to its environment, it faces inevitable extinction.
If an organism fails to adapt to its environment, it faces inevitable extinction.
Facile à confondre
Learners use 'will' in the zero conditional because they think the result is in the future.
Learners aren't sure which one to use in zero conditionals.
Learners try to use 'you should' or 'you must' instead of a simple imperative in instructions.
Erreurs courantes
If you heat ice, it will melt.
If you heat ice, it melts.
If it rain, the grass gets wet.
If it rains, the grass gets wet.
If I am hungry I eat.
If I am hungry, I eat.
If you not eat, you die.
If you don't eat, you die.
When it will rain, I stay home.
When it rains, I stay home.
If I wake up late, I'm missing the bus.
If I wake up late, I miss the bus.
If you mix oil and water, they are separating.
If you mix oil and water, they separate.
If you would heat ice, it melts.
If you heat ice, it melts.
If the alarm rings, you will leave.
If the alarm rings, leave.
If you don't have a ticket, you aren't entering.
If you don't have a ticket, you don't enter.
If the data will be corrupted, the system fails.
If the data is corrupted, the system fails.
Structures de phrases
If you ___, you ___.
When it ___, I ___.
If the ___ ___, the ___ ___.
___ ___ if ___ ___.
Real World Usage
If the sauce thickens too much, add a splash of water.
If the screen stays black, hold the power button for ten seconds.
If you drop the weights, you lose your membership.
If the catalyst is added, the reaction rate doubles.
If you don't clean your room, you don't get dessert.
If you work on a holiday, you get double pay.
Pense : 'Toujours vrai'
Évite 'Will' et 'Would'
Avoid using future tenses (will/would).
'If' et 'When', les amis
They both signal that the condition consistently leads to the same result.
Instructions polies
If you could..., especially in formal settings.
La virgule, s'il te plaît !
Repère l'impératif
If the light is red, stop.C'est toujours du Conditionnel Zéro, décrivant une action nécessaire.
Smart Tips
Check that both verbs are in the Present Simple. Do not use 'will'.
Try swapping them. If the meaning stays the same, you are looking at a Zero Conditional.
Use the imperative in the second clause for a clearer, more professional tone.
Look for the 'If'. If it's at the start, put a comma in the middle. If it's in the middle, remove all commas.
Prononciation
The 'If' Clause Lift
In the first part of the sentence (the condition), your voice usually goes up in pitch at the end of the clause to show the sentence isn't finished.
The Result Clause Fall
The second part of the sentence (the result) ends with a falling intonation to signal the end of the statement.
Rising-Falling
If it rains [rising], the grass gets wet [falling].
Standard declarative conditional statement.
Mémorise-le
Moyen mnémotechnique
FACTS: Frequently Always Constant True Situations. If it's a FACT, use the Zero Conditional.
Association visuelle
Imagine a light switch. If you flip the switch (Condition), the light turns on (Result). It happens every single time, without fail. This is the Zero Conditional.
Rhyme
If the fact is always true, Present Simple is for you!
Story
A scientist in a lab always follows rules. If he mixes A and B, it explodes. If he leaves the door open, the mice escape. His life is a series of Zero Conditionals because everything is a predictable result of an action.
Word Web
Défi
Look around your room. Find three things that always happen. (e.g., 'If I press this button, the TV turns on.') Write them down using the Zero Conditional.
Notes culturelles
British speakers frequently use the zero conditional to talk about the weather and social etiquette. 'If it's sunny, everyone goes to the park.'
In academic and scientific writing, the zero conditional is the standard for defining laws and repeatable results.
Americans often use the zero conditional for 'tough love' advice or stating blunt facts of life.
The word 'if' comes from the Old English 'gif', which has Germanic roots. The structure of using present tenses for universal truths has been a stable feature of English for centuries.
Amorces de conversation
What happens if you don't drink water for a whole day?
If you have a free weekend, what do you usually do?
How does your body react if you are very stressed?
In your country, what happens if someone breaks a minor law?
Sujets d'écriture
Erreurs courantes
Test Yourself
If the kettle ___, it means the water is boiling.
Find and fix the mistake:
If you will drop glass, it will break.
Choisis la bonne phrase :
Arrange the words in the correct order:
All words placed
Click words above to build the sentence
Score: /4
Exercices pratiques
8 exercisesIf you ___ (mix) hydrogen and oxygen, you ___ (get) water.
Select the correct sentence:
Find and fix the mistake:
If she don't study, she fails her exams.
If you freeze water, it becomes ice.
You can use 'when' instead of 'if' in the Zero Conditional without changing the meaning.
A: Why is the grass so dry? B: Well, if it ___ (not rain), the grass ___ (die).
Identify the incorrect usage:
1. If you touch fire... 2. If you don't sleep... 3. If you add sugar...
Score: /8
Practice Bank
12 exercisesWhen the temperature ___ below zero, water freezes.
If you will mix blue and yellow, you will get green.
Quelle phrase est correcte ?
Traduis en anglais : 'Si hace calor, la gente suda.'
Arrange ces mots en une phrase :
Associe les conditions aux bons résultats :
If you ___ the red button, the alarm sounds.
When he is late, he will usually call.
Quelle phrase est correcte ?
Arrange ces mots en une phrase :
Associe le début de l'instruction à sa bonne fin :
Score: /12
FAQ (8)
No. If you use `will`, it becomes a First Conditional, which is for specific future events, not general truths.
They are mostly interchangeable. `When` suggests the condition happens more frequently or certainly than `if`.
Only if the `if` clause comes first. If the result clause is first, no comma is used.
Yes, but you must use the Past Simple in both clauses. 'If it rained, we played inside.' This is called the Past Real Conditional.
It is neutral. It is used in both very formal scientific papers and very informal daily speech.
Yes! This is very common for instructions. 'If you are tired, go to bed.'
Because there is 'zero' doubt about the result. It is a 100% certainty.
Yes. `Unless` means `if not`. 'Plants die unless they get water.'
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Si + presente + presente
Spanish speakers rarely make the mistake of adding 'will' (hará) in this context.
Si + présent + présent
French speakers might use 'quand' (when) more frequently than 'si'.
Wenn + Präsens + Präsens
The verb moves to the end of the 'wenn' clause in German, unlike English.
Verb-ru + to (~と)
Japanese has several conditional forms (~ba, ~tara), but 'to' is the closest to the Zero Conditional.
Idha (إذا) + Present
Arabic can also use the past tense after 'Idha' to express a condition, which confuses learners.
Ruguo (如果) ... jiu (就) ...
The lack of tense markers in Chinese makes the 'Present Simple' concept abstract for learners.
Learning Path
Prerequisites
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