When you embed one clause inside another in French, the first decision is structural: do you use an infinitive ("je veux partir") or a finite que-clause ("je veux que tu partes")? The answer is mechanical once you know the rule. If the subject of the embedded action is the same as the subject of the main verb, French strongly prefers the infinitive — there is no overt subject pronoun, no que, no conjugated form. If the subjects differ, French uses que followed by a finite verb in the subjunctive or indicative. English has no such constraint: we say "I want to leave" and "I want him to leave" with parallel structures, the subject of the embedded verb simply attaching as an object pronoun. French refuses that parallel: the same-subject case takes a bare infinitive, the different-subject case takes a full subordinate clause. Internalize this rule and you will avoid the single most common error in B1-level French syntax.
The same-subject rule, stated plainly
The rule has two halves, and both are essential.
Half one — same subject, infinitive. When the action of the embedded verb has the same agent as the main verb, French uses the infinitive. There is no need to repeat the subject; the bare infinitive is enough.
Je veux venir.
I want to come.
Elle espère réussir l'examen.
She hopes to pass the exam.
Nous préférons rester à la maison ce soir.
We'd rather stay home tonight.
Il croit avoir raison, mais il se trompe complètement.
He thinks he's right, but he's completely wrong.
Half two — different subjects, que-clause. When the agent of the embedded verb is not the main subject, French requires que and a finite verb. With volition, emotion, and doubt verbs, that finite verb is in the subjunctive. With assertion or belief verbs, it is in the indicative.
Je veux que tu viennes.
I want you to come.
Elle espère que ses enfants réussiront.
She hopes her children will succeed.
Nous préférons que vous restiez.
We'd rather you stayed.
Il croit que sa femme a raison.
He thinks his wife is right.
Why French enforces this rule
English uses a curious construction sometimes called "exceptional case marking" — I want him to leave — where the embedded subject (him) sits as the object of the matrix verb but conceptually serves as the subject of to leave. French simply does not allow this. The embedded subject must either disappear entirely (because it is identical to the main subject and recoverable) or appear as a full subject pronoun inside a que-clause. There is no middle ground where the embedded subject sits as an object of the main verb.
This is why French speakers find sentences like "je veux lui partir" or "j'aimerais toi venir" so jarring — neither construction exists. The grammar forces a binary choice: collapse to infinitive, or expand to que-clause.
The economy of the rule is that the infinitive in French is unmarked for person and tense; it carries only the lexical content of the verb. When the subject is recoverable from context (because it equals the matrix subject), French drops everything redundant. Spanish, Italian, and Portuguese share this preference, but French enforces it more strictly than any of them — Portuguese, for instance, has a personal infinitive that allows different subjects ("para tu partires"), which French cannot do.
Verbs that take the infinitive directly (no preposition)
A core group of French verbs takes the infinitive directly, with no linking preposition. These fall into four families.
Verbs of will and preference. Vouloir, désirer, souhaiter, préférer, aimer, détester, adorer. All take infinitive directly when same-subject.
Je voudrais boire un café avant de partir.
I'd like to have a coffee before leaving.
Elle déteste se lever tôt le dimanche.
She hates getting up early on Sundays.
Modal verbs. Pouvoir, devoir, savoir. These take a bare infinitive directly and never accept a que-clause complement at all. Falloir is the impersonal exception — see below.
Tu dois finir tes devoirs avant de sortir.
You have to finish your homework before going out.
Je ne sais pas conduire en ville.
I don't know how to drive in the city.
Il faut partir maintenant.
We have to leave now.
Falloir is impersonal and behaves differently from the other modals: when there is no specific subject, the bare infinitive is used (il faut partir). With a specific subject, falloir requires que + subjunctive (il faut que tu partes) — the bare infinitive is unavailable here.
Verbs of opinion (with same subject). Croire, penser, espérer, estimer, juger. These can take the infinitive directly when the subject is the same — a more elegant register than the que-clause.
Je crois avoir compris ce qu'il a dit.
I think I've understood what he said.
Elle pense pouvoir nous aider demain.
She thinks she can help us tomorrow.
The que-clause is also possible here, though slightly heavier: je crois que j'ai compris, elle pense qu'elle peut nous aider. Both are correct and natural, with the infinitive being marginally more written/elevated.
Verbs of perception. Voir, entendre, sentir, regarder, écouter. These take a direct object plus an infinitive, which functions like English "see/hear someone do something."
J'ai vu Marie traverser la rue.
I saw Marie cross the street.
On entend les enfants jouer dans le jardin.
You can hear the children playing in the garden.
Causative faire. This is a special construction where faire + infinitive means "have/make someone do something." See the dedicated page on causative faire for full details.
Je fais réparer ma voiture chez le garagiste.
I'm having my car fixed at the garage.
When the que-clause is mandatory
Three situations force the que-clause and rule out the infinitive.
Different subjects. This is the headline case. If the agent of the embedded verb differs from the main subject, the infinitive is unavailable.
Je veux que tu m'écoutes attentivement.
I want you to listen to me carefully.
Elle souhaite que ses parents viennent au mariage.
She wishes her parents would come to the wedding.
Nous espérons qu'il fera beau dimanche.
We hope the weather will be nice on Sunday.
Verbs that don't accept an infinitive complement. Some verbs simply cannot take an infinitive complement, even when the subject matches. Dire que, savoir que (in the sense of "to know that"), constater que, remarquer que, déclarer que — these introduce a finite clause regardless of subject identity.
Je dis que tu as raison.
I'm saying you're right.
Il déclare qu'il est innocent.
He declares he is innocent.
You cannot say "je dis avoir raison" in standard French even though both subjects are "je" — dire requires a finite que-clause for an assertion. (Note: dire de + infinitif exists but means "to tell someone to do X" — a different construction entirely: je lui dis de partir = "I'm telling him to leave.")
Impersonal triggers with a specific subject. When an impersonal expression like il faut, il vaut mieux, il est nécessaire targets a specific subject, you must use que + subjunctive.
Il faut que tu fasses tes devoirs.
You need to do your homework.
Il vaudrait mieux que nous partions tôt.
It would be better if we left early.
Without a specific subject, the bare infinitive surfaces: il faut partir, il vaut mieux partir.
The subjunctive vs indicative split inside que-clauses
When the same-subject rule forces you into a que-clause, the next decision is mood. This is governed by the matrix verb, not by the same-subject rule itself.
Volition, emotion, doubt → subjunctive.
Je veux qu'il vienne.
I want him to come.
Je suis content que tu sois là.
I'm glad you're here.
Je doute qu'elle réussisse.
I doubt she'll succeed.
Assertion, belief, observation → indicative.
Je sais qu'il vient demain.
I know he's coming tomorrow.
Je crois qu'elle a raison.
I think she's right.
Je vois qu'il est fatigué.
I can see he's tired.
The mood choice is independent of the same-subject decision; the dedicated subjunctive triggers pages cover the full inventory of which verbs trigger which mood.
A drilled contrast
Compare these matched pairs to see the rule in action.
Je veux partir tôt.
I want to leave early. (same subject — infinitive)
Je veux que tu partes tôt.
I want you to leave early. (different subjects — que + subjunctive)
Elle est contente d'être ici.
She's happy to be here. (same subject — de + infinitive)
Elle est contente que tu sois ici.
She's happy you're here. (different subjects — que + subjunctive)
Nous espérons gagner le match.
We hope to win the match. (same subject — infinitive)
Nous espérons que vous gagnerez.
We hope you'll win. (different subjects — que + indicative)
Il croit avoir trouvé la solution.
He thinks he's found the solution. (same subject — infinitive, formal/written)
Il croit que tu as trouvé la solution.
He thinks you've found the solution. (different subjects — que + indicative)
The pattern is rigid. Once you absorb it, French sentence-building becomes a much faster mental operation: identify the subjects, count them, branch accordingly.
Common Mistakes
❌ Je veux que je parte tôt.
Incorrect — same-subject que-clause is forbidden in French.
✅ Je veux partir tôt.
I want to leave early. — same subject collapses to infinitive.
❌ J'espère que je réussis.
Incorrect — same-subject que-clause sounds awkward and should collapse.
✅ J'espère réussir.
I hope to succeed. — same subject, bare infinitive.
❌ Il veut moi venir avec lui.
Incorrect — French has no exceptional-case-marking; you cannot put the embedded subject as a pronoun object.
✅ Il veut que je vienne avec lui.
He wants me to come with him. — different subjects, full que-clause.
❌ Je dis avoir raison.
Incorrect — dire que requires a finite clause for assertion, even with same subject.
✅ Je dis que j'ai raison.
I say I'm right. — finite que-clause is required after dire que.
❌ Je préfère que je reste ici.
Incorrect — same-subject reduction is mandatory, not optional.
✅ Je préfère rester ici.
I'd rather stay here. — bare infinitive.
The core habit to build: every time you reach for "que" after a verb of will, emotion, or opinion, ask whether the embedded subject is the same as the matrix subject. If yes, drop the que and the subject pronoun, and use the infinitive. If no, keep the full que-clause and apply the appropriate mood. This single check eliminates a large fraction of the syntax errors that B1 learners make.
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Start learning French→Related Topics
- Infinitive Clauses: The Same-Subject RuleB2 — When the subject of a subordinate verb is the same as the subject of the main verb, French collapses the clause into an infinitive instead of writing a full que-clause. Mastering this constraint is one of the surest signs of natural French.
- L'Infinitif: OverviewA2 — The French infinitive is the bare verb form (parler, finir, vendre, faire). It is the dictionary entry, the most syntactically flexible form of the verb, and the form English speakers most often misuse — usually because they reach for the '-ing' form where French wants the bare infinitive.
- Subjunctive after Verbs of Desire and VolitionB1 — When you want, prefer, wish, demand, or expect someone else to do something, French uses the subjunctive — and when the wanter and the doer are the same person, French collapses the construction to a plain infinitive.
- Les Verbes Modaux: Overview of French Modal VerbsA2 — French has four core modal verbs — pouvoir, vouloir, devoir, savoir — plus the impersonal falloir. Each takes a bare infinitive (no preposition), each is highly irregular in conjugation, and each shifts politely into the conditionnel.
- De + Infinitif vs Que + SubjonctifB1 — A large family of French verbs and adjectives takes 'de + infinitive' when the subject of the embedded action matches the main subject, and 'que + subjunctive' when the subjects differ. 'Je suis content de partir' versus 'je suis content que tu partes' is the canonical contrast. Mastering this list of triggers and their two complement forms is essential for natural B1 sentence-building.
- Le Causatif avec FaireB1 — The causative faire + infinitive lets one verb express English 'have someone do,' 'make someone do,' and 'get something done.' Master the agent marking with à and par, the rigid pronoun ordering, and the invariable past participle.