Learn everything about the French word si

The French word si can be an adverb or a conjunction. Either way, si has several meanings and is used in numerous French constructions.

Si = if
Si is the French word for "if":

Je ne sais pas si je veux y aller
I don't know if I want to go

Dis-moi si ça te conviendra
Tell me if that will work for you

Et si je ne suis pas fatigué ?
And if I'm not tired?

Si j'étais riche, j'achèterais une maison
If I were rich, I would buy a house
(lesson on si clauses)

Si = so

Si can be used as an intensifier:

Je suis si fatigué
I'm so tired

J'ai si faim
I'm so hungry

Je ne savais pas qu'il était si mignon
I didn't know he was so cute

Si = as, so
Si can make a comparison:

Il n'est pas si intelligent qu'il pense
He's not as smart as he thinks

Ce n'est pas si facile
It's not as easy as that, It's not that easy

Si = while, whereas

Si can put two clauses in opposition:

S'il est beau, sa femme est laide
Whereas he is handsome, his wife is ugly

Si tu es gentil, ton frère est méchant
You're kind, while your brother is mean

Si = however, no matter how

Si can be followed by a subjunctive clause to express a concession:

Si beau qu'il fasse, je ne peux pas sortir
No matter how nice the weather is, I can't go out

Si gentil que tu sois, je ne t'aime pas
However kind you are, I don't love you

Si = yes
Si means "yes" in response to a negative question or statement:Tu ne vas pas venir ? Si (je vais venir)
You're not going to come? Yes (I am going to come)

N'as-tu pas d'argent ? Si, j'en ai
Don't you have any money? Yes, I do

Jeanne n'est pas prête.