How do you say we must in french?

There are a few ways to say "we must" in French, depending on the context and formality:

Formal:

* Il faut que nous... (It is necessary that we...) This is the most formal and literal way to say it.

* Nous devons... (We must...) This is also formal and commonly used.

Informal:

* On doit... (We have to...) This is a more informal and common way to say "we must".

* Il faut... (We must...) This is also informal and commonly used, especially when referring to a general rule.

Here are some examples:

* Formal: Il faut que nous allions à la réunion. (We must go to the meeting.)

* Formal: Nous devons travailler plus dur. (We must work harder.)

* Informal: On doit se dépêcher. (We have to hurry.)

* Informal: Il faut manger des fruits et des légumes. (We must eat fruits and vegetables.)

The best choice for you will depend on the situation and who you are speaking to.