Subjunctive Triggers in French

Overview

Knowing how to conjugate the subjunctive is only half the battle -- you also need to know when to use it. Subjunctive triggers are the verbs, expressions, and conjunctions that require the subjunctive mood in the clause that follows them. At the B1 level, mastering these triggers is what separates learners who understand the subjunctive in theory from those who use it correctly in practice.

The triggers fall into clear categories: necessity, desire, emotion, doubt, judgment, and certain conjunctions. Once you learn to recognize these categories, you will intuitively know when the subjunctive is needed, even with expressions you have never seen before.

The key principle is that the subjunctive appears when the main clause introduces subjectivity -- something that is wanted, feared, doubted, or not yet realized. When the main clause states a fact or certainty, the indicative is used instead.

How It Works

Verbs and expressions requiring the subjunctive

Category	Triggers	Example
Necessity	il faut que, il est necessaire que, il est essentiel que	Il faut que je parte.
Desire/Will	vouloir que, desirer que, souhaiter que, preferer que	Je veux qu'il vienne.
Emotion	etre content que, etre triste que, avoir peur que, regretter que	J'ai peur qu'il pleuve.
Doubt	douter que, il est possible que, il est peu probable que	Je doute qu'il sache.
Judgment	il est important que, il est normal que, il vaut mieux que	Il est important que tu comprennes.
Denial/Negation	ne pas penser que, ne pas croire que, nier que	Je ne crois pas qu'il soit la.

Conjunctions requiring the subjunctive

Conjunction	Meaning	Example
avant que	before	Avant qu'il pleuve...
pour que / afin que	so that / in order that	Pour que tu comprennes...
bien que / quoique	although	Bien qu'il fasse froid...
a moins que	unless	A moins qu'il vienne...
jusqu'a ce que	until	Jusqu'a ce qu'il parte...
sans que	without	Sans qu'il le sache...
de peur que / de crainte que	for fear that	De peur qu'il ne tombe...

Expressions that do NOT trigger the subjunctive

Expression	Mood	Why
penser que (affirmative)	Indicative	Stating a belief as fact
croire que (affirmative)	Indicative	Expressing certainty
il est certain que	Indicative	Certainty
il est evident que	Indicative	Obvious fact
apres que	Indicative	Action already completed
parce que	Indicative	Stating a reason/fact

Examples in Context

French	English	Note
Il faut que je parte.	I have to leave.	Necessity
Avant qu'il pleuve...	Before it rains...	Conjunction: before
Pour que tu comprennes...	So that you understand...	Conjunction: purpose
A moins qu'il vienne...	Unless he comes...	Conjunction: unless
Je veux que tu sois la.	I want you to be there.	Desire
Il est important que vous sachiez.	It's important that you know.	Judgment
Bien qu'elle soit fatiguee, elle travaille.	Although she's tired, she works.	Concession
J'ai peur qu'il ne comprenne pas.	I'm afraid he won't understand.	Emotion/fear
Jusqu'a ce que tu reviennes...	Until you come back...	Conjunction: until
Il est possible qu'ils arrivent en retard.	It's possible they'll arrive late.	Possibility
Sans que personne le sache...	Without anyone knowing...	Conjunction: without
Je suis content que tu aies reussi.	I'm glad you succeeded.	Emotion + past subjunctive

Common Mistakes

Using the subjunctive after esperer que

• Wrong: J'espere qu'il vienne.
• Right: J'espere qu'il viendra.
• Why: Despite expressing a wish, esperer que takes the indicative (usually future). This is one of the most common exceptions that trips up learners.

Forgetting that affirmative penser/croire take the indicative

• Wrong: Je pense qu'il soit intelligent.
• Right: Je pense qu'il est intelligent.
• Why: Affirmative penser and croire express a belief stated as fact, so they take the indicative. Only their negative forms trigger the subjunctive.

Using the subjunctive after apres que

• Wrong: Apres qu'il soit parti...
• Right: Apres qu'il est parti... (or more commonly, Apres qu'il fut parti...)
• Why: Apres que technically takes the indicative because it refers to a completed action. However, many native speakers use the subjunctive here in informal speech, making this a contested point.

Using the subjunctive when both clauses share the same subject

• Wrong: Je veux que je parte.
• Right: Je veux partir.
• Why: When the subject of both clauses is the same, use the infinitive instead of que + subjunctive. This applies to most triggers.

Usage Notes

The expletive ne (also called ne explétif) appears with some subjunctive triggers, particularly avoir peur que, craindre que, de peur que, avant que, and a moins que. This ne does not make the sentence negative:

• J'ai peur qu'il ne tombe. = I'm afraid he'll fall. (Not: I'm afraid he won't fall.)

This usage is formal and gradually disappearing in spoken French, but you will encounter it in writing.

Some triggers allow both subjunctive and indicative depending on the degree of certainty the speaker wishes to express:

• Il semble qu'il soit malade. (It seems he's sick -- uncertain)
• Il me semble qu'il est malade. (It seems to me he's sick -- more certain)

Practice Tips

1. Create a two-column chart: one column for subjunctive triggers, one for indicative expressions. Add to it as you encounter new examples in reading and listening. This visual reference will become invaluable.
2. Practice transforming sentences from infinitive to subjunctive: Il faut partir (same subject) becomes Il faut que tu partes (different subject). This drills the structural shift.
3. When reading French texts, highlight every instance of que followed by a verb and identify whether it uses indicative or subjunctive. Then find the trigger that determined the choice.

Related Concepts

• Present Subjunctive -- the conjugation patterns for the subjunctive mood
• Subordinating Conjunctions -- broader coverage of conjunctions including non-subjunctive ones
• Expletive Ne -- the formal ne that appears with certain subjunctive triggers