French often uses a three-part pattern to speak about imagined situations, unreal events, advice, wishes, regrets, and polite requests:

si + imperfect, present conditional

(si = “if”)

This is one of the main ways to say “if this happened, that would happen.”

The first part gives the condition. The second part gives the result.

Si j’avais plus de temps, je voyagerais davantage.
“If I had more time, I would travel more.”

The condition is not seen as real at the present moment. It may be unlikely, imagined, or simply not true now.

The basic structure

The pattern is:

si + imperfect, present conditional

Examples:

Si tu étudiais plus, tu réussirais facilement.
“If you studied more, you would succeed easily.”

Si nous habitions près de la mer, nous irions à la plage tous les jours.
“If we lived near the sea, we would go to the beach every day.”

Si elle connaissait la réponse, elle nous la dirait.
“If she knew the answer, she would tell us.”

The order can also be reversed:

Je voyagerais davantage si j’avais plus de temps.
“I would travel more if I had more time.”

The meaning of the imperfect here

The imperfect in this structure does not mainly describe past time. It marks the condition as unreal, imagined, uncertain, or contrary to fact.

Si j’étais riche, j’achèterais une grande maison.
“If I were rich, I would buy a big house.”

The speaker is not rich.

Si nous avions une voiture, nous pourrions partir demain.
“If we had a car, we could leave tomorrow.”

The speaker does not have a car.

The meaning of the present conditional

The present conditional gives the result that would follow from the imagined condition.

Si tu venais ce soir, je serais très content.
“If you came tonight, I would be very happy.”

Si elle avait son numéro, elle l’appellerait.
“If she had his number, she would call him.”

Common uses

Imagined present situations

Si je vivais au Japon, j’apprendrais le japonais plus vite.
“If I lived in Japan, I would learn Japanese faster.”

Si nous avions un jardin, nous planterions des légumes.
“If we had a garden, we would grow vegetables.”

Unlikely or unreal situations

Si les chats pouvaient parler, ce serait étrange.
“If cats could talk, that would be strange.”

Si je gagnais au loto, j’arrêterais de travailler.
“If I won the lottery, I would stop working.”

Giving advice

French often uses this pattern to soften advice.

Si j’étais toi, je refuserais cette offre.
“If I were you, I would refuse that offer.”

Si j’étais à votre place, je demanderais plus de détails.
“If I were in your place, I would ask for more details.”

This is one of the most common uses.

Expressing wishes

Si seulement il comprenait.
“If only he understood.”

Si nous pouvions recommencer.
“If only we could start again.”

The second clause is sometimes omitted when the meaning is obvious.

Polite suggestions

Si nous prenions un taxi ?
“What if we took a taxi?”

Si on allait au cinéma ?
“What if we went to the cinema?”

These forms sound softer and less direct than commands.

Important rule: no conditional after si

French does not normally use the conditional directly after si in this structure.

Correct:

Si j’avais le temps, je viendrais.
“If I had time, I would come.”

Incorrect:

Si j’aurais le temps, je viendrais.

This mistake is very common among learners.

Comma usage

A comma is usually used when the si clause comes first.

Si tu pouvais m’aider, je t’en serais reconnaissant.
“If you could help me, I would be grateful.”

When the main clause comes first, the comma is often omitted.

Je t’en serais reconnaissant si tu pouvais m’aider.
“I would be grateful if you could help me.”

Common verbs in this structure

Some verbs appear very often.

Être

Si j’étais plus patient, je me mettrais moins en colère.
“If I were more patient, I would get angry less often.”

Avoir

Si tu avais un ordinateur portable, tu pourrais travailler partout.
“If you had a laptop, you could work anywhere.”

Pouvoir

Si nous pouvions partir plus tôt, ce serait mieux.
“If we could leave earlier, that would be better.”

Vouloir

Si elle voulait vraiment apprendre, elle progresserait vite.
“If she really wanted to learn, she would improve quickly.”

Devoir

Si tu devais choisir, que ferais-tu ?
“If you had to choose, what would you do?”

Questions with this structure

French often uses this pattern in hypothetical questions.

Si tu pouvais vivre n’importe où, où irais-tu ?
“If you could live anywhere, where would you go?”

Si tu rencontrais le président, que lui dirais-tu ?
“If you met the president, what would you say to him?”

Negative forms

Si je ne travaillais pas demain, je sortirais ce soir.
“If I were not working tomorrow, I would go out tonight.”

Si elle ne faisait pas autant de bruit, je pourrais dormir.
“If she did not make so much noise, I could sleep.”

Spoken French shortcuts

In spoken French, on is very common.

Si on partait maintenant, on arriverait avant midi.
“If we left now, we would arrive before noon.”

People also sometimes shorten il y avait to y avait in casual speech.

Si y avait moins de trafic, ce serait plus agréable.
“If there were less traffic, it would be more pleasant.”

This is informal spoken French.

Difference from real conditions

French uses different tenses for real and unreal conditions.

Real or likely condition:

Si tu viens demain, nous mangerons ensemble.
“If you come tomorrow, we will eat together.”

Imagined or unreal condition:

Si tu venais demain, nous mangerions ensemble.
“If you came tomorrow, we would eat together.”

The first sentence presents the situation as possible and realistic. The second sounds more uncertain, imagined, or less likely.

Difference from past unreal situations

For unreal past situations, French uses:

si + pluperfect, past conditional

Si j’avais étudié, j’aurais réussi.
“If I had studied, I would have succeeded.”

This refers to a past event that did not happen.

By contrast:

Si j’étudiais davantage, je réussirais.
“If I studied more, I would succeed.”

This refers to the present or future.

Alternative constructions

French sometimes uses other forms with similar meanings.

Au cas où + conditional

This means “in case.”

Au cas où tu aurais besoin d’aide, appelle-moi.
“In case you need help, call me.”

This construction is different from si + imperfect, but learners often compare them because both discuss uncertain situations.

À ta place instead of si j’étais toi

Instead of saying:

Si j’étais toi, je partirais.
“If I were you, I would leave.”

French can also say:

À ta place, je partirais.
“In your place, I would leave.”

This is shorter and very common.

Using imaginer or supposer

French can express hypothetical ideas without si.

Imagine que tu gagnes un million d’euros.
“Imagine that you win a million euros.”

Supposons qu’il refuse.
“Let us suppose that he refuses.”

These forms often sound more direct or more literary than the standard si structure.

Frequent learner problems

Using the wrong tense after si

Incorrect:

Si je serais riche, j’achèterais un château.

Correct:

Si j’étais riche, j’achèterais un château.
“If I were rich, I would buy a castle.”

Confusing present and past unreal conditions

Present unreal:

Si elle venait, je serais heureux.
“If she came, I would be happy.”

Past unreal:

Si elle était venue, j’aurais été heureux.
“If she had come, I would have been happy.”

Translating English too directly

English sometimes uses forms like “If I would have known.” Standard French does not follow that pattern.

Correct French:

Si j’avais su, je ne serais pas venu.
“If I had known, I would not have come.”

Useful fixed expressions

Si j’étais toi…
“If I were you…”

Si seulement…
“If only…”

Et si… ?
“What if…?”

Comme si…
“As if…”

Examples:

Il parle comme s’il savait tout.
“He speaks as if he knew everything.”

Et si on commandait une pizza ?
“What if we ordered a pizza?”

Summary

The structure si + imperfect, present conditional is one of the main ways to speak about imagined, unreal, or unlikely situations in French.

The pattern is:

si + imperfect, present conditional

Examples:

Si j’avais de l’argent, je voyagerais.
“If I had money, I would travel.”

Si nous pouvions rester plus longtemps, nous le ferions.
“If we could stay longer, we would do it.”

French normally does not use the conditional directly after si in this construction.

This pattern is common in advice, wishes, polite suggestions, hypothetical questions, and imagined situations.