French grammar explained
Parce que, car or puisque?
These three connectors can introduce a reason, but they do not present that reason in the same way. Parce que gives a direct answer, car adds an explanation, and puisque starts from a reason treated as already known or obvious.
Quick answer: use parce que in most everyday situations and after pourquoi. Use car mainly in careful writing or formal speech to add an explanation. Use puisque when both speakers already know the reason, or when the reason is evident.
How do parce que, car and puisque differ?
| Connector | Main function | Typical register | Can answer pourquoi? |
|---|---|---|---|
| parce que | Gives the cause directly | Neutral; spoken and written | Yes |
| car | Adds an explanatory justification | More common in writing and formal speech | Not normally as a standalone answer |
| puisque | Uses a reason presented as known or obvious | Neutral; often argumentative | Not for a neutral request for new information |
When should you use parce que?
Parce que is the safest and most frequent choice. It introduces the real cause of an event and works naturally in conversation and writing.Je reste chez moi parce que je suis malade.
I’m staying home because I’m sick.
Use parce que to answer pourquoi
— Pourquoi est-ce que tu apprends le français ?
— Parce que je travaille avec des collègues français.
— Why are you learning French? — Because I work with French colleagues.
When should you use car?
Car introduces an explanation that supports what the speaker has just said. It is common in written French, presentations and careful speech, but less frequent than parce que in relaxed conversation.La réunion est reportée, car plusieurs personnes sont absentes.
The meeting has been postponed because several people are absent.
Natural usage: in everyday speech, La réunion est reportée parce que plusieurs personnes sont absentes is often more spontaneous. Using car is not “more correct”; it simply gives the sentence a more written or explanatory tone.
Do not use car as a one-word answer
After Pourquoi ?, answer with parce que, not car. A standalone answer such as Car je suis fatigué sounds incomplete or literary in ordinary conversation.When should you use puisque?
Use puisque when the reason is already known, visible, accepted or presented as obvious. English translations include “since,” “as,” “given that” and sometimes “because.”Puisque tu es là, aide-moi à déplacer cette table.
Since you’re here, help me move this table.
Nous allons prendre un taxi puisqu’il n’y a plus de métro.
We’re going to take a taxi since the metro is no longer running.
Be careful with tone
Because puisque presents the reason as obvious, it can sound impatient when used in disagreement.Mais puisque je te l’ai déjà expliqué !
But I’ve already explained it to you!
Can you replace one connector with another?
Sometimes, but the focus changes.| Sentence | What it communicates |
|---|---|
| Je pars parce que je suis fatigué. | My tiredness is the direct cause and may be new information. |
| Je pars, car je suis fatigué. | I announce my decision, then add an explanation. |
| Puisque je suis fatigué, je vais partir. | My tiredness is treated as known or evident, and it supports my decision. |
Word order matters
Parce que usually follows the result, although it can begin a sentence. Car normally links backward to a statement that has already been made, so it does not naturally open an isolated sentence. Puisque often comes first because the known reason creates the starting point for a conclusion.What about à cause de and grâce à?
These are prepositions followed by a noun or noun group, not conjunctions followed by a full clause.Le train est en retard à cause de la neige.
The train is late because of the snow.
J’ai progressé grâce à tes conseils.
I improved thanks to your advice.
Mini practice: choose the most natural connector
- — Pourquoi tu pars tôt ? — ______ j’ai un rendez-vous.
- ______ nous sommes tous d’accord, nous pouvons prendre une décision.
- Le magasin sera fermé demain, ______ c’est un jour férié. (formal notice)
- Je n’ai pas acheté ce livre ______ je l’avais déjà.
- ______ tu connais bien la ville, quel restaurant nous conseilles-tu ?
- Elle préfère travailler le matin, ______ elle se concentre mieux.
See the answers
- Parce que — direct answer to pourquoi.
- Puisque — shared agreement becomes the basis for the decision.
- car — explanatory tone in a formal notice; parce que is also grammatically possible.
- parce que — neutral cause.
- Puisque — the person’s knowledge is already established.
- parce que in neutral speech; car is possible in more written style.
Final recap
Choose parce que when you simply give the cause or answer pourquoi. Choose car when you add an explanation in careful writing or formal speech. Choose puisque when the reason is already shared, obvious or used as the basis for a conclusion. The three words overlap, but they organise information differently.Make grammar choices with more confidence
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