Rechercher
whether
01
si
used to talk about a doubt or choice when facing two options
02
used to show an inquiry; if
03
in any case
Exemple
I can't decide whether to wear a dress or jeans to the event.
She asked whether he liked ice cream or cake better.
Jane asked her friend whether he wanted to join her for lunch or eat separately.
I'm not sure whether I should go to the party or stay home.
He's trying to figure out whether he should study abroad or stay in his home country.