"Tu sais cette ville ?" "Je sais bien cette personne." "Tu sais ce film ?." Three sentences, three mistakes - and every time the same problem: the student uses savoir where connaître is needed. In English, one verb does the job: "to know." In French, there are two. And they are not interchangeable.
Savoir is used for facts, verifiable information, and skills: "je sais qu'il est parti" (I know he left), "je sais nager" (I know how to swim), "je ne sais pas pourquoi" (I don't know why). Connaître is used for people, places, and things you've experienced firsthand: "je connais Paris" (I know Paris), "tu connais Marie ?" (do you know Marie?), "je connais cette chanson" (I know this song). The test: if "know" can be replaced by "know how to" or "know that," use savoir. If it means "be familiar with" or "be acquainted with," use connaître.
Savoir - facts and skills
Savoir is used in three main cases:
1. Savoir + que / pourquoi / comment / quand / où (information)
- "Je sais qu'il est parti." (I know he left)
- "Tu sais pourquoi elle est en retard ?" (Do you know why she's late?)
- "On ne sait pas comment ça marche." (We don't know how it works)
2. Savoir + infinitive (a skill)
- "Elle sait nager." (She knows how to swim)
- "Tu sais conduire ?" (Can you drive?)
- "Il ne sait pas cuisiner." (He can't cook)
3. Savoir on its own (a fact you hold)
- "Je sais." (I know - I have the information)
- "Je ne sais pas." (I don't know)
- "Tu savais que le magasin était fermé ?" (Did you know the shop was closed?)
As a general rule, savoir is followed by a clause (que, si, pourquoi...), an infinitive, or used alone. It doesn't take a concrete noun as a direct object (except a few fixed expressions like "je sais ma leçon").
Connaître - experience and familiarity
Connaître is used when you're talking about something or someone you've encountered, discovered, or spent time with. It's the verb of familiarity.
People:
- "Tu connais Marie ?" (Have you met Marie?)
- ❌ "Peut-être que tu sais ce voisin"
✅ "Peut-être que tu connais ce voisin" - ❌ "Je sais bien cette personne"
✅ "Je connais bien cette personne"
Places:
- "Je connais bien Paris." (I know Paris well)
- ❌ "Tu sais cette ville ?"
✅ "Tu connais cette ville ?"
Things you recognize:
- "Tu connais ce film ?" (Have you seen/heard of it?)
- ❌ "Tu sais ce film ?"
✅ "Tu connais ce film ?" - ❌ "Je ne sais pas si tu sais cette chanson"
✅ "Je ne sais pas si tu connais cette chanson"
General rule: connaître is followed by a noun (a person, a place, a thing). You can't say "connaître que..." (unlike "savoir que...") and it's not followed by an infinitive.
A good test in most cases
When in doubt, replace "know" in your head:
- "I know that he left" → information → savoir (je sais qu'il est parti)
- "I know how to swim" → skill → savoir (je sais nager)
- "I know Paris" → familiarity → connaître (je connais Paris)
- "I know this song" → familiarity → connaître (je connais cette chanson)
Another memory trick: if you can put a proper noun or an article + noun right after the verb, it's connaître. If you need a linking word (que, si, comment, pourquoi) or a verb in the infinitive, it's savoir.
The English calque trap
English speakers often import English structures directly into French. The classic one:
- ❌ "Je suis familier avec le mot"
✅ "Je connais le mot"
"Être familier avec" does exist in French, but in everyday language, native speakers will more naturally just say "connaître." It's shorter, simpler, and what a francophone would choose spontaneously.
Common traps around connaître
Certains + gens = careful
- ❌ "Je connais certains gens qui ont fait ça"
✅ "Je connais certaines personnes qui ont fait ça"
The combination "certains gens" is rare and sounds old-fashioned. In practice, French speakers strongly prefer "certaines personnes," "quelques personnes," or simply "des gens."
When things get tricky
There are a few situations where both verbs are possible, but with different meanings:
- "Je sais ma leçon." = I've learned it by heart, I can recite it
- "Je connais ma leçon." = I'm familiar with its content
- "Je sais son nom." = I have the information (his name is Pierre)
- "Je connais son nom." = that name rings a bell, it's familiar to me
In everyday conversation, these nuances are subtle. But they illustrate the core logic: savoir = information, connaître = experience.
NB: in the passé composé, "connaître" can take on a special meaning. "J'ai connu ton grand-père" means "I met / knew your grandfather at one point" - it's over. Whereas "je connais ton grand-père" (present) means you still know each other. It's a nuance that even native speakers use without thinking, but it often surprises learners.
