B1 conditional 6分で読める

Conditional Present - Formation

The conditional is your grammar 'softener' for politeness, advice, and imagining possibilities with the power of 'would'.

The Rule in 30 Seconds

  • Used for 'would' in English to express wishes, advice, or polite requests.
  • Formed by taking the Future stem and adding Imparfait endings (-ais, -ais, -ait...).
  • Always contains an 'r' before the ending, just like the future tense.
  • Never use it directly after 'si' (if); use the imparfait instead.

Quick Reference

Subject Stem (Infinitive/Future) Ending Example
Je parler- -ais Je parlerais (I would speak)
Tu finir- -ais Tu finirais (You would finish)
Il/Elle vendr- -ait Elle vendrait (She would sell)
Nous mang-er- -ions Nous mangerions (We would eat)
Vous ir- (irregular) -iez Vous iriez (You would go)
Ils/Elles aur- (irregular) -aient Ils auraient (They would have)

主な例文

3 / 9
1

Je `voudrais` un verre d'eau, s'il vous plaît.

I would like a glass of water, please.

2

Nous `aimerions` visiter le Louvre demain.

We would like to visit the Louvre tomorrow.

3

Si j'étais toi, je `partirais` maintenant.

If I were you, I would leave now.

💡

The 'R' Rule

If you don't hear an 'R' sound, it's not the conditional. Every conditional verb in French has an 'R' right before the ending. It's the hallmark of the tense.

⚠️

The 'Si' Trap

Never use the conditional after 'si'. Think of 'si' as a magnet that repels the conditional. Use the imparfait instead: 'Si j'avais...' not 'Si j'aurais...'

The Rule in 30 Seconds

  • Used for 'would' in English to express wishes, advice, or polite requests.
  • Formed by taking the Future stem and adding Imparfait endings (-ais, -ais, -ait...).
  • Always contains an 'r' before the ending, just like the future tense.
  • Never use it directly after 'si' (if); use the imparfait instead.

Overview

Welcome to the most polite tense in the French language. If the French language had a "please and thank you" filter, the conditionnel présent would be it. Think of it as the magic wand that turns a blunt command into a sophisticated request. In English, we usually translate this as "would." You use it when you aren't 100% sure something will happen. You use it when you are dreaming about the future. Most importantly, you use it when you want to be nice to your waiter. Without it, you might sound like a bossy toddler. With it, you sound like a cultured traveler. It is the bridge between what is real and what is possible. It is your best friend for making plans, giving advice, or just daydreaming about a villa in Provence.

How This Grammar Works

This tense is a bit of a hybrid. It is like a grammar smoothie. It takes the stem from the future tense and the endings from the imparfait. This mix gives it a unique feel. The "r" sound from the future tells your brain that we are looking forward. The endings from the past soften the blow. It creates a mood of possibility rather than certainty. Imagine a traffic light that is blinking yellow. It is not quite "go" (the future) and not quite "stop" (the past). It is the "maybe" zone. In your brain, always associate this tense with the word "would." If you want to say "I would go," "she would eat," or "we would like," you are in conditional territory. It is less about a specific point in time and more about the *vibe* of the sentence.

Formation Pattern

  1. 1Building this tense is surprisingly logical. You don't need to learn a whole new set of rules if you already know the future and the imparfait. Here is your three-step recipe for success:
  2. 2Find your stem. For regular -er and -ir verbs, this is just the infinitive. For example, parler or finir.
  3. 3Adjust for -re verbs. If the verb ends in -re, like vendre, you just chop off the final e. Your stem becomes vendr-.
  4. 4Add the endings. Use the same endings you used for the imparfait. These are: -ais, -ais, -ait, -ions, -iez, -aient.
  5. 5Let's look at manger (to eat). The stem is manger.
  6. 6Je mangerais (I would eat)
  7. 7Tu mangerais (You would eat)
  8. 8Il mangerait (He would eat)
  9. 9Nous mangerions (We would eat)
  10. 10Vous mangeriez (You would eat)
  11. 11Ils mangeraient (They would eat)
  12. 12Yes, there are irregulars. But here is the good news: the irregular stems are exactly the same as the future tense. If you know je serai (I will be), then you know je serais (I would be). The "r" is your constant companion here. It acts like a little signal flag saying, "Hey, I'm the conditional!"

When To Use It

There are four main scenarios where this tense shines in the real world:

  • Politeness: This is the most common use. Instead of saying Je veux un café (I want a coffee), which sounds like a demand, you say Je voudrais un café (I would like a coffee). It changes everything. It’s the difference between a smile and a scowl from your server.
  • Wishes and Dreams: Use it to talk about things you want but don't have yet. J'aimerais voyager au Japon (I would love to travel to Japan). It expresses a desire without the pressure of a concrete plan.
  • Giving Advice: If a friend is struggling, use devrait. Tu devrais dormir plus (You should sleep more). It’s softer than using the imperative command form.
  • Hypotheticals (The "Si" Clauses): This is the classic B1 usage. When you say "If X happened, I would do Y." For example: Si j'avais de l'argent, j'achèterais une voiture (If I had money, I would buy a car). Note that the "if" part uses the imparfait, and the result uses the conditionnel.

When Not To Use It

One of the biggest traps for English speakers is using the conditional immediately after the word si (if). In English, we sometimes say "If I would have..." but in French, this is a total crime. There is a famous catchy phrase in French schools: *Les "si" n'aiment pas les "rais".* It means the word si and the -rais ending of the conditional hate each other. They never hang out in the same clause.

Si j'aurais le temps... (Wrong!)

Si j'avais le temps... (Correct!)

You also don't use it for things that are certain to happen. If you are 100% sure you are going to the beach tomorrow, use the futur simple. The conditional is for the "what ifs" and the "maybes." If there is no doubt, there is no conditional.

Common Mistakes

Mixing up the futur simple and the conditionnel présent is the most frequent blunder. Look at these two:

  • Je mangerai (I will eat - Future)
  • Je mangerais (I would eat - Conditional)

The only difference is that tiny "s" at the end. When speaking, they sound almost identical in many regions of France. However, in writing, that "s" changes the whole meaning. Another mistake is forgetting the irregular stems. Some people try to say j'allerais instead of j'irais. Remember, if the future stem is weird, the conditional stem is also weird. They are like identical twins who share the same closet but wear different hats (endings).

Contrast With Similar Patterns

How does this differ from the imparfait? The imparfait describes things that *used to* happen or *were* happening. The conditional describes things that *would* happen.

  • Imparfait: Je mangeais (I was eating).
  • Conditionnel: Je mangerais (I would eat).

What about the futur simple? Use the future for things that *will* happen. Use the conditional for things that *might* happen if a condition is met.

  • Future: Il pleuvra (It will rain).
  • Conditional: Il pleuvrait (It would rain... if the clouds moved in).

Think of the future as a promise and the conditional as a possibility. One is a firm handshake; the other is a polite shrug.

Quick FAQ

Q. Is the conditional a tense or a mood?

A. Technically, it's a mood in most grammar books, but we often treat it like a tense. Don't let the labels stress you out.

Q. Can I use it for a job interview?

A. Absolutely! It makes you sound professional and respectful when discussing potential roles or contributions.

Q. Does every verb have an "r" in the conditional?

A. Yes! Every single one. If you don't hear or see an "r" before the ending, it's not the conditional. It's the law.

Q. Why is it called "present" conditional?

A. Because it talks about things from the perspective of now. There is also a "past" conditional for things that *would have* happened but didn't. One step at a time, though!

Reference Table

Subject Stem (Infinitive/Future) Ending Example
Je parler- -ais Je parlerais (I would speak)
Tu finir- -ais Tu finirais (You would finish)
Il/Elle vendr- -ait Elle vendrait (She would sell)
Nous mang-er- -ions Nous mangerions (We would eat)
Vous ir- (irregular) -iez Vous iriez (You would go)
Ils/Elles aur- (irregular) -aient Ils auraient (They would have)
💡

The 'R' Rule

If you don't hear an 'R' sound, it's not the conditional. Every conditional verb in French has an 'R' right before the ending. It's the hallmark of the tense.

⚠️

The 'Si' Trap

Never use the conditional after 'si'. Think of 'si' as a magnet that repels the conditional. Use the imparfait instead: 'Si j'avais...' not 'Si j'aurais...'

🎯

Sound it Out

In casual speech, 'je mangerais' and 'je mangerai' sound almost the same. If you're writing, just remember: the Conditional always needs an 'S' for 'je'.

💬

The Polite Tourist

Using 'Je voudrais' instead of 'Je veux' will literally change your experience in France. It's like a secret passcode for better service and friendly interactions.

例文

9
#1 Basic

Je `voudrais` un verre d'eau, s'il vous plaît.

Focus: voudrais

I would like a glass of water, please.

Using 'vouloir' in conditional is the standard way to be polite.

#2 Basic

Nous `aimerions` visiter le Louvre demain.

Focus: aimerions

We would like to visit the Louvre tomorrow.

Expressing a wish or plan with 'aimer'.

#3 Edge Case

Si j'étais toi, je `partirais` maintenant.

Focus: partirais

If I were you, I would leave now.

Giving advice using a 'si' clause (If + Imparfait -> Conditional).

#4 Edge Case

Selon les rumeurs, il `serait` déjà marié.

Focus: serait

According to rumors, he would be (reportedly is) already married.

Used to report unconfirmed news or hearsay.

#5 Formal

`Pourriez`-vous m'indiquer le chemin de la gare ?

Focus: Pourriez

Could you show me the way to the station?

Extremely common in formal requests or when asking strangers for help.

#6 Mistake Corrected

✗ Si je `serais` riche → ✓ Si j'étais riche, j'achèterais un bateau.

Focus: étais

If I were rich, I would buy a boat.

Never use the conditional right after 'si'. Use imparfait instead.

#7 Mistake Corrected

✗ Je `mangerai` si j'avais faim → ✓ Je `mangerais` si j'avais faim.

Focus: mangerais

I would eat if I were hungry.

The 's' is vital to distinguish between 'will eat' and 'would eat'.

#8 Advanced

Il a dit qu'il `viendrait` nous voir plus tard.

Focus: viendrait

He said that he would come to see us later.

Known as 'future in the past' when reporting what someone said earlier.

#9 Advanced

Dans ce cas, nous `devrions` peut-être revoir notre stratégie.

Focus: devrions

In that case, we should perhaps rethink our strategy.

Using 'devoir' in conditional to suggest a course of action professionally.

自分をテスト

Complete the sentence with the correct form of 'vouloir' in the conditional.

Je ___ voyager autour du monde.

✓ 正解! ✗ おしい! 正解: a

To express a wish ('would like'), use the conditional 'voudrais'. 'Voulais' is past and 'voudrai' is future.

Choose the correct ending for the 'nous' form of 'parler' in the conditional.

Si nous avions du temps, nous ___ plus souvent.

✓ 正解! ✗ おしい! 正解: b

The 'nous' ending for the conditional is -ions added to the infinitive stem 'parler'.

Fix the 'si' clause error.

Si tu ___ (étudier) plus, tu réussirais l'examen.

✓ 正解! ✗ おしい! 正解: c

After 'si', you must use the imparfait ('étudiais'), not the conditional or future.

🎉 スコア: /3

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Future Simple vs. Conditionnel Présent

Futur Simple (Certainty)
Je mangerai I will eat (No doubt)
Il ira He will go (Planned)
Conditionnel (Possibility)
Je mangerais I would eat (If possible)
Il irait He would go (Hypothetical)

How to Build a Conditional Verb

1

Is the verb regular?

YES ↓
NO
Use the irregular Future stem (e.g., ir-, aur-, ser-)
2

Does the verb end in -re?

YES ↓
NO
Use the full Infinitive as your stem
3

Chop off the 'e' from the ending?

YES ↓
NO
Wait, always chop the 'e' for -re verbs!
4

Ready for endings?

YES ↓
NO
Add -ais, -ais, -ait, -ions, -iez, -aient

Key Irregular Stems (The 'R' Club)

To Be/Have

  • Être → ser-
  • Avoir → aur-
🏃

Movement

  • Aller → ir-
  • Venir → viendr-
🛠️

Modal Verbs

  • Vouloir → voudr-
  • Pouvoir → pourr-
  • Devoir → devr-

よくある質問

21 問

It almost always translates to 'would'. For example, je danserais means 'I would dance'.

It's a mix! It uses the future's 'neck' (stem) and the past's 'hat' (ending). It looks forward but with a soft, past-like ending.

Because life isn't always certain. The future is for things that will happen, while the conditional is for things that might happen if conditions were different.

Use the verbs vouloir or pouvoir. Pourriez-vous m'aider ? means 'Could you help me?' and sounds very polite.

Yes! For regular -er and -ir verbs, the stem is just the whole verb, like chanter or finir. Then just add the ending.

For -re verbs, you just drop the final 'e' to make the stem. So vendre becomes vendr-.

Yes! Whether the verb is regular or irregular, the endings are always -ais, -ais, -ait, -ions, -iez, -aient.

They are very similar. Voudrais (would like) is standard for ordering, while aimerais (would love) is slightly more emotional or for bigger dreams.

In the present form, it's more about advice or wishes. To express true regret about the past, you'd usually use the conditional past (e.g., j'aurais dû).

They are the exact same as the future tense irregulars. If you know je serai (future), you know je serais (conditional).

Use the verb devoir. Tu devrais étudier means 'You should study'. It's much nicer than just shouting 'Study!' at someone.

Yes, if it's a prediction or hypothetical. Il ferait beau demain s'il ne pleuvait pas means 'The weather would be nice tomorrow if it didn't rain'.

It's a classic grammatical error that sounds very uneducated to native speakers. Always follow 'si' with the imparfait in these cases.

It's when you talk about what someone said would happen. 'He said he would come' becomes Il a dit qu'il viendrait.

The endings -ais, -ais, -ait, and -aient all sound like a short 'eh' (like the 'e' in 'pet').

The stem is pourr-. So it's je pourrais, tu pourrais, etc. Note the double 'r'!

Yes, journalists often use it to avoid being sued. L'avion se serait écrasé means 'The plane reportedly crashed'.

Absolutely. On pourrait aller au cinéma means 'We could go to the movies'. It's very common in casual suggestions.

It can be, but it's also used with friends. It's more about being 'gentle' than being 'fancy'.

Try imagining what you would do if you won the lottery. Start every sentence with Si je gagnais à la loterie, je....

Yes, devrait is the French equivalent of 'should'. Elle devrait m'appeler means 'She should call me'.

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