Grammar Rule in 30 Seconds
Use the First Conditional to talk about real possibilities in the future by pairing a present tense condition with a future result.
- Use 'if' + present simple for the condition: If it rains...
- Use 'will' + base verb for the result: ...I will stay home.
- The order doesn't matter: I will stay home if it rains.
Overview
- If it rains, I will stay home.
- If she studies, she will pass the exam.
- If you are late, the teacher won't be happy.
- I will stay home if it rains.
- She will pass the exam if she studies.
- If you eat too much, you might feel sick.
- If you ask nicely, she can help you.
- ❌ If it will rain, I will stay home.
- ✅ If it rains, I will stay home.
- Never use will in the if clause!
Meanings
The First Conditional describes a situation that is likely to happen in the future if a specific condition is met.
Predicting outcomes
Talking about logical consequences of future actions.
“If you touch that, you will burn your hand.”
“If we leave now, we will arrive on time.”
Making promises
Committing to a future action based on a condition.
“If you help me, I will buy you lunch.”
“If you finish your work, I will give you a bonus.”
Giving warnings
Stating negative consequences of an action.
“If you don't hurry, you will miss the bus.”
“If you eat all that candy, you will get a stomachache.”
First Conditional Structure
| If Clause | Main Clause | Example |
|---|---|---|
| If + Present Simple | Will + Base Verb | If it rains, I will stay. |
| If + Present Simple | Will not + Base Verb | If it rains, I won't go. |
| If + Present Simple | Will + Base Verb? | If it rains, will you stay? |
| If + Present Simple | Imperative | If you see him, tell him. |
| If + Present Simple | Modal Verb | If it rains, I might stay. |
| If + Present Simple | Present Simple | If you heat ice, it melts. |
Contractions
| Full Form | Contraction |
|---|---|
| I will | I'll |
| You will | You'll |
| He will | He'll |
| She will | She'll |
| It will | It'll |
| We will | We'll |
| They will | They'll |
| Will not | Won't |
Reference Table
| Form | Structure | Example |
|---|---|---|
| Affirmative | If + Present, Will + Verb | If I study, I will pass. |
| Negative | If + Present, Won't + Verb | If I don't study, I won't pass. |
| Question | Will + Subject + Verb + If... | Will you pass if you study? |
| Inverted | Will + Verb + If + Present | I will pass if I study. |
| Short Answer | Yes, I will / No, I won't | Will you go? Yes, I will. |
| Modal | If + Present, Might + Verb | If I study, I might pass. |
正式程度
Should you arrive late, you will forfeit your seat. (Event policy)
If you are late, you will lose your seat. (Event policy)
If you're late, you'll lose your seat. (Event policy)
Late? You're toast. (Event policy)
First Conditional Logic
Condition
- If Si
Tense
- Present Simple Presente Simple
Result
- Will Futuro
First vs Second Conditional
Decision Flow
Is it a real possibility?
Common Uses
Warnings
- • If you don't run, you will be late.
Promises
- • If you help, I will pay you.
Plans
- • If I finish, I will go out.
按水平分级的例句
If it is sunny, I will go out.
Si hace sol, saldré.
If I have time, I will call you.
Si tengo tiempo, te llamaré.
If you want, we will eat pizza.
Si quieres, comeremos pizza.
If he comes, I will be happy.
Si él viene, estaré feliz.
If you don't study, you will fail the test.
Si no estudias, reprobarás el examen.
Will you help me if I ask you?
¿Me ayudarás si te lo pido?
If she arrives late, we will start without her.
Si ella llega tarde, empezaremos sin ella.
I will buy that car if I save enough money.
Compraré ese coche si ahorro suficiente dinero.
If the weather improves, we might go for a hike.
Si el clima mejora, podríamos ir de excursión.
If you need any assistance, please let me know.
Si necesita ayuda, por favor hágamelo saber.
If we don't act now, the situation will only get worse.
Si no actuamos ahora, la situación solo empeorará.
You will feel much better if you get some sleep.
Te sentirás mucho mejor si duermes un poco.
If the proposal is accepted, we will commence the project immediately.
Si se acepta la propuesta, comenzaremos el proyecto de inmediato.
Should you require further information, I will be happy to assist.
Si requiere más información, estaré encantado de ayudar.
If the market crashes, investors will lose a significant amount of capital.
Si el mercado colapsa, los inversores perderán una cantidad significativa de capital.
If you happen to see him, tell him I called.
Si por casualidad lo ves, dile que llamé.
If the data proves to be accurate, we will proceed with the publication.
Si los datos resultan ser precisos, procederemos con la publicación.
If you are to succeed, you must be willing to make sacrifices.
Si vas a tener éxito, debes estar dispuesto a hacer sacrificios.
If the policy is implemented, it will fundamentally alter the landscape.
Si se implementa la política, alterará fundamentalmente el panorama.
If you should find any errors, please notify the administrator.
Si encontraras algún error, por favor notifica al administrador.
If it be the case that the evidence is insufficient, the case will be dismissed.
Si fuera el caso de que la evidencia es insuficiente, el caso será desestimado.
If you were to consider the implications, you would realize the gravity of the situation.
Si consideraras las implicaciones, te darías cuenta de la gravedad de la situación.
If the trend continues unabated, we will face an existential crisis.
Si la tendencia continúa sin cesar, enfrentaremos una crisis existencial.
If you should happen upon the truth, you will find it quite unsettling.
Si te toparas con la verdad, la encontrarías bastante inquietante.
容易混淆
Learners mix up First (future) and Zero (general truths).
Learners use 'would' in the if-clause.
Learners use 'will' after 'when' or 'as soon as'.
常见错误
If it will rain, I will stay.
If it rains, I will stay.
If I will go, I will see him.
If I go, I will see him.
If I go, I see him.
If I go, I will see him.
If I will go, I see him.
If I go, I will see him.
If I would go, I will see him.
If I go, I will see him.
If I go, I would see him.
If I go, I will see him.
If I will go I will see him.
If I go, I will see him.
If I will have time, I will call.
If I have time, I will call.
If I go, I might to see him.
If I go, I might see him.
If I will be there, I will help.
If I am there, I will help.
If I were to go, I will see him.
If I go, I will see him.
If I should go, I would see him.
If I should go, I will see him.
If I am to go, I would see him.
If I am to go, I will see him.
If I go, I shall see him.
If I go, I will see him.
句型
If I ___, I will ___.
If you don't ___, you will ___.
___ will happen if I ___.
If the ___ ___, we will ___.
Real World Usage
If you're late, text me!
If I am hired, I will work hard.
If I miss the train, will I get a refund?
If the food is cold, I will complain.
If you like this, share it!
If the party fails to pay, the contract is void.
Comma Rule
No 'Will' in If
Use Modals
Be Polite
Smart Tips
Use 'Should you...' to sound more professional.
Always use contractions like 'I'll' or 'you'll'.
Use the imperative in the result clause for impact.
Use 'might' or 'may' instead of 'will'.
发音
Contractions
Native speakers almost always use 'I'll' instead of 'I will'.
Linking
The 'f' in 'if' often links to the next word.
Rising-Falling
If it RAINS, I will STAY home.
Standard statement of fact.
记住它
记忆技巧
If you want to be real, keep the present in the 'if' seal.
视觉联想
Imagine a light switch. 'If' is the switch (Present), 'Will' is the light turning on (Future).
Rhyme
If you want the future to be clear, keep the present tense near.
Story
Sarah wants to go to the beach. She says, 'If the sun shines, I will go.' She checks the weather. 'If it rains, I will stay home.' She is making real plans for the day.
Word Web
挑战
Write 5 sentences about your plans for tomorrow using 'If'.
文化笔记
Often uses 'shall' in formal contexts.
Very common to drop 'that' in conditional sentences.
Used to set expectations in negotiations.
The First Conditional evolved from Old English conditional structures using 'gif' (if).
对话开场白
What will you do if it rains this weekend?
If you win the lottery, what will you buy first?
If you could change one thing about your job, what would it be?
If the government implements a new tax, how will it affect you?
日记主题
Test Yourself
If it ___ (rain), I will stay home.
Which is correct?
Find and fix the mistake:
If you will study, you pass.
Arrange the words in the correct order:
All words placed
Click words above to build the sentence
Si tengo dinero, compraré un coche.
Answer starts with: If ...
Match each item on the left with its pair on the right:
If it rains, I ___ go out.
If you ___ (not/hurry), you will miss the bus.
Score: /8
练习题
8 exercisesIf it ___ (rain), I will stay home.
Which is correct?
Find and fix the mistake:
If you will study, you pass.
will / If / I / I / go / see / him
Si tengo dinero, compraré un coche.
If you don't eat...
If it rains, I ___ go out.
If you ___ (not/hurry), you will miss the bus.
Score: /8
常见问题 (8)
No, never. It is grammatically incorrect in standard English.
First is for real possibilities; Second is for imaginary ones.
Only if the 'if' clause comes first.
Yes, it shows less certainty.
Yes, for contracts and negotiations.
Yes, for giving instructions.
It changes the meaning to a time-based event.
No, it is very logical once you practice.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Si + presente, futuro
Spanish allows the future in the if-clause in some dialects, while English strictly forbids it.
Si + présent, futur
French has more complex rules for the 'si' + 'il' contraction.
Wenn + Präsens, Futur
German word order is much stricter regarding the verb position.
~tara / ~ba
Japanese is a suffix-based language, not a word-order-based one.
Idha + mudari'
Arabic has a very different verb conjugation system based on roots.
Ruguo + verb
Chinese lacks verb conjugation entirely, relying on time markers.
