Using 'si' instead of 'oui' to disagree with a negative question or statement

In most cases, we use oui (yes) and non (no) in French the same way as in English.

However, if someone asks you a negative question or makes a negative statement and you want to disagree with it (i.e. answer in the positive) then use si instead of oui.
 
Here are some examples:

Agreeing...

Est-ce que tu parles français? Oui, je parle français.
Do you speak French? Yes, I speak French.

Disagreeing...

Tu ne t'amuses pas? - Si, je m'amuse.
Aren't you having a good time? - Yes, I am.

Il n'est pas gentil. - Si, il est gentil.
He's not nice. - Yes, he is. 

Bref, ce n'est pas important... - Si, c'est important !
Anyway, it's not important... - Yes, it is!

Tu n'as pas une clope? - Si.
Don't you have a smoke? - Yes I do.

Summary:

- Use Oui  to answer "yes" to positive questions/statements

- Use Si  to answer "yes" to negative questions/statements 

Note that non is always the same whether you are agreeing or disagreeing:

Est-ce que tu parles français? Non, je ne parle pas français.
Do you speak French? No, I don't speak French.

Tu ne parles pas français?  - Non, je ne parle pas français.
Don't you speak French? - No, I don't speak French.

Learn more about these related French grammar topics

Examples and resources

Tu n'as pas une clope? - Si.
Don't you have a smoke? - Yes I do.


Tu ne parles pas français?  - Non, je ne parle pas français.
Don't you speak French? - No, I don't speak French.


Tu ne t'amuses pas? - Si, je m'amuse.
Aren't you having a good time? - Yes, I am.


Bref, ce n'est pas important... - Si, c'est important !
Anyway, it's not important... - Yes, it is!


Il n'est pas gentil. - Si, il est gentil.
He's not nice. - Yes, he is. 


Tu ne parles pas français?  - Si! Je parle français.
Don't you speak French? - Yes! I do speak French.


Est-ce que tu parles français? Non, je ne parle pas français.
Do you speak French? No, I don't speak French.


Attention


Est-ce que tu parles français? Oui, je parle français.
Do you speak French? Yes, I speak French.


Q&A Forum 2 questions, 2 answers

GregA2Kwiziq community member

I did say Oui. The system thought I said Qui

Asked 4 months ago
CécileKwiziq team memberCorrect answer

Hi Greg, 

If that was in a quiz you will need to re-post using the 'Report it' button in your Correction Board as it links to the specific quiz and could then be answered....

I did say Oui. The system thought I said Qui

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DonC1Kwiziq community member

What about sentences that end with "non."

In this context, is a sentence that ends with "non" (like "Tu as faim, non ?") considered a positive or negative question? I am guessing it is positive, and that an affirmative answer would be made with "oui" instead of "si."
Asked 2 years ago
RonC1 Kwiziq Q&A super contributor
Bonjour Don, Je suis d'accord avec vous. Le «non» fait la phrase interrogative; pourtant, Tu as faim est affirmative. J'espère que ma réponse vous aiderait. Bonne chance et bonne continuation dans vos études en français, la langue de Molière et qui a été utilisé par le monde français depuis l’époque d’Hugues Capet

What about sentences that end with "non."

In this context, is a sentence that ends with "non" (like "Tu as faim, non ?") considered a positive or negative question? I am guessing it is positive, and that an affirmative answer would be made with "oui" instead of "si."

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