B1 conditionals 5分で読める

First Conditional: Can in Result Clause

Use 'If + Present Simple, can + verb' to describe realistic future opportunities or permissions.

The Rule in 30 Seconds

  • Use 'if' + Present Simple to set a future condition.
  • Use 'can' + base verb to show a possible result.
  • This pattern focuses on options, permission, or future abilities.
  • Do not use 'will' or 'can' inside the 'if' clause.

Quick Reference

If-Clause (Condition) Result-Clause (Possibility) Meaning / Context
If you finish early you can go home Giving permission
If we save money we can buy a car Future ability
If you have a map you can find the way General possibility
If she joins us she can meet the team Opportunity
If it doesn't rain we can eat outside Open option
If you ask nicely you can borrow my pen Permission

主な例文

3 / 8
1

If you practice every day, you can play the guitar well.

Si practicas todos los días, puedes tocar bien la guitarra.

2

If you finish your dinner, you can have some dessert.

Si terminas tu cena, puedes comer postre.

3

If we don't hurry, we can't catch the last bus.

Si no nos apuramos, no podemos alcanzar el último autobús.

💡

The Comma Rule

If 'if' starts the sentence, use a comma. If 'if' is in the middle, no comma is needed. It's like a bridge connecting two islands.

⚠️

The 'Will' Trap

Never put 'will' or 'can' immediately after 'if'. It's the most common mistake for B1 learners. Stick to the simple present!

The Rule in 30 Seconds

  • Use 'if' + Present Simple to set a future condition.
  • Use 'can' + base verb to show a possible result.
  • This pattern focuses on options, permission, or future abilities.
  • Do not use 'will' or 'can' inside the 'if' clause.

Overview

Imagine you are at a local cafe. You see a sign on the counter. It says: "If you buy a large latte, you can get a free cookie." This is the first conditional with can. It is one of the most useful tools in English. It helps you talk about real possibilities. It focuses on what is possible or allowed in the future. You are not just saying what *will* happen. You are talking about choices and opportunities. It is like opening a door to a new option. Think of it as the "opportunity" grammar. It makes your English sound flexible and natural.

How This Grammar Works

This structure links a specific condition to a possible result. The condition is the "if" part. The result is the can part. We use can instead of will for a reason. Will sounds like a 100% promise. Can sounds like a choice or a permission. It tells the listener that the result is available. It is not forced upon them. If you finish your homework, you can play video games. This means you have the permission to play. It does not mean you *must* play. It gives the listener power over the outcome. It is very common in negotiations and daily plans.

Formation Pattern

  1. 1Building this sentence is like putting together two Lego blocks.
  2. 2Start with the If clause. Use the Present Simple tense here.
  3. 3Add a comma if the If clause comes first.
  4. 4Start the result clause with a subject.
  5. 5Use can followed by the base form of the verb.
  6. 6Pattern: If + [Present Simple], [Subject] + can + [Base Verb].
  7. 7Example: If it is sunny, we can go to the park.
  8. 8You can also flip the sentence.
  9. 9Example: We can go to the park if it is sunny.
  10. 10Notice that the comma disappears when if is in the middle. It is like a grammar traffic light. The comma tells you when to pause.

When To Use It

Use this pattern when you want to offer someone a choice. It is perfect for ordering food at a restaurant. "If I pay extra, can I get avocado?" It is also great for giving directions. "If you turn left, you can see the museum." In a job interview, it shows your skills. "If you hire me, I can help your team grow." You are describing a realistic future. This is not about magic or impossible dreams. It is about things that can actually happen. Use it for permission, like a parent talking to a child. Use it for ability, like a coach talking to a player. It covers a lot of ground in daily life.

When Not To Use It

Do not use this for things that are 100% certain laws of nature. For those, use the Zero Conditional. For example, do not say "If you heat ice, it can melt." Say "It melts." Also, do not use can for things that are totally impossible. If you are dreaming about being a bird, use the Second Conditional instead. Avoid using can if you are making a firm, scary threat. "If you steal that, you will go to jail" sounds much stronger than can. Can implies there is a choice or a maybe. Also, never use can in the past tense here. This rule is strictly for the present and the future.

Common Mistakes

Yes, even native speakers mess this up sometimes. The biggest mistake is using will in the if clause. Never say: "If it will rain..." (No!). Always say: "If it rains..." (Yes!). Another common error is adding to after can. You should never say: "I can to go." Just say: "I can go." Some people also forget the Present Simple "s" for he, she, or it. "If he go..." is wrong. "If he goes..." is correct. It is a small detail, but it makes a big difference. Think of these rules as the ingredients in a recipe. If you miss one, the cake might taste a bit funny.

Contrast With Similar Patterns

How is this different from using will? Will is a definite prediction. "If you study, you will pass." This sounds like a guarantee. Can is about the ability or the option. "If you study, you can pass." This sounds like the door is open for you. It feels more encouraging and less like a command. Compared to may or might, can is more common in casual speech. May sounds very formal, like a king giving a decree. Can sounds like a friend giving you a suggestion. Use can when you want to sound helpful and modern.

Quick FAQ

Q. Can I use can in the if part?

A. Usually no. Keep can in the result part for this specific rule.

Q. Is it okay to use can't?

A. Absolutely! "If you don't have a ticket, you can't enter."

Q. Does the meaning change if I flip the sentence?

A. No, the meaning stays exactly the same. Only the comma moves.

Q. Can I use this in a business email?

A. Yes, it is very professional and polite for making offers.

Q. What if I want to sound more certain?

A. Use will instead of can to show 100% certainty.

Reference Table

If-Clause (Condition) Result-Clause (Possibility) Meaning / Context
If you finish early you can go home Giving permission
If we save money we can buy a car Future ability
If you have a map you can find the way General possibility
If she joins us she can meet the team Opportunity
If it doesn't rain we can eat outside Open option
If you ask nicely you can borrow my pen Permission
💡

The Comma Rule

If 'if' starts the sentence, use a comma. If 'if' is in the middle, no comma is needed. It's like a bridge connecting two islands.

⚠️

The 'Will' Trap

Never put 'will' or 'can' immediately after 'if'. It's the most common mistake for B1 learners. Stick to the simple present!

🎯

Softening Requests

Using 'can' in a conditional makes a request sound less bossy. 'If you have time, can you help?' sounds much nicer than 'Help me!'

💬

Polite Offers

In English-speaking cultures, we love giving options. Using 'can' shows you respect the other person's choice.

例文

8
#1 Basic Ability

If you practice every day, you can play the guitar well.

Focus: can play

Si practicas todos los días, puedes tocar bien la guitarra.

Focuses on developing a skill.

#2 Basic Permission

If you finish your dinner, you can have some dessert.

Focus: can have

Si terminas tu cena, puedes comer postre.

A classic example of giving permission.

#3 Edge Case: Negative

If we don't hurry, we can't catch the last bus.

Focus: can't catch

Si no nos apuramos, no podemos alcanzar el último autobús.

Using the negative 'can't' for a restricted result.

#4 Edge Case: Questions

If I pay by credit card, can I get a receipt?

Focus: can I get

Si pago con tarjeta, ¿puedo obtener un recibo?

Asking about a possibility in a transaction.

#5 Formal Context

If the board approves the budget, we can start the project.

Focus: can start

Si la junta aprueba el presupuesto, podemos comenzar el proyecto.

Professional use in a business setting.

#6 Mistake Corrected 1

✗ If you will study, you can pass. → ✓ If you study, you can pass.

Focus: study

Si estudias, puedes aprobar.

Never use 'will' in the if-clause.

#7 Mistake Corrected 2

✗ If it is cold, you can to wear a coat. → ✓ If it is cold, you can wear a coat.

Focus: can wear

Si hace frío, puedes usar un abrigo.

No 'to' after 'can'.

#8 Advanced Usage

If you happen to see Mark, you can tell him I'm looking for him.

Focus: can tell

Si por casualidad ves a Mark, puedes decirle que lo estoy buscando.

'Happen to' adds a layer of chance.

自分をテスト

Choose the correct form to complete the sentence.

If you ___ the secret code, you can enter the room.

✓ 正解! ✗ おしい! 正解: know

We use the Present Simple in the if-clause of the first conditional.

Complete the result clause with the correct structure.

If she brings her laptop, we ___ the movie together.

✓ 正解! ✗ おしい! 正解: can watch

The modal 'can' is followed by the base verb without 'to'.

Pick the correct negative form.

If you don't have a password, you ___ log in.

✓ 正解! ✗ おしい! 正解: can't

'Can't' is the standard negative form for the result clause.

🎉 スコア: /3

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Will vs. Can in Results

Using 'Will'
Certainty It WILL happen (100%).
Promise If you come, I will be there.
Using 'Can'
Possibility It is POSSIBLE (50-90%).
Option If you come, we can watch a movie.

Building Your Sentence

1

Is the condition in the Present Simple?

YES ↓
NO
Change 'will' or 'past' to Present Simple.
2

Is 'can' in the result clause?

YES ↓
NO
Move 'can' to the part without 'if'.
3

Is there a 'to' after 'can'?

YES ↓
NO
Perfect! Your sentence is ready.

Real World Scenarios

🍔

At a Restaurant

  • If you order a burger, you can get fries.
  • If you are vegan, you can swap the cheese.
💼

At Work

  • If you finish the report, you can leave.
  • If you need help, you can call me.

よくある質問

20 問

The structure is If + Present Simple, Subject + can + Base Verb. For example, If it rains, we can stay home.

No, this specific rule is for future possibilities. For the past, you would use the Third Conditional with could have.

Not exactly. Will expresses a certainty or a promise, while can expresses a possibility or permission.

English grammar rules forbid using future markers like will inside the if clause. We use the Present Simple to represent the future condition.

Yes, but remember the verb in the if clause needs an 's'. Example: If she studies, she can pass.

Yes, can't is very common for expressing things that won't be possible. If you don't pay, you can't enter.

Yes, you can. You can see the ocean if you climb that hill is perfectly correct.

No, you do not need a comma when the if clause comes second. The word if acts as the connector.

Yes, may is a more formal version of can. If you finish, you may leave sounds very official.

If the condition is impossible or very unlikely, you should use the Second Conditional (If I were...). This rule is for real, likely things.

You can, but it sounds weak. If you do that, I can call the police sounds like you are still thinking about it.

Yes, it's great for showing potential. If you hire me, I can start immediately is a strong sentence.

Move can to the front of the result clause. If I help you, can we go to the movies later?

No, it can also mean ability. If you practice, you can swim faster is about ability, not permission.

Zero Conditional is for facts that are always true. First Conditional is for a specific situation in the future.

Yes. If you are tired, you can take a nap is a very common sentence.

It is always can do. Never use to after a modal verb like can.

You can, but it's often unnecessary. If it rains, then we can stay home is fine but a bit wordy.

It is extremely common! You will hear it in almost every conversation about plans or rules.

Using could usually shifts the sentence to the Second Conditional, making it sound less likely. Stick to can for real possibilities.

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