We have already once seen modal verbs, in the chapter french survival guide.
Verbs like must,
dare, do not describe an action (like normal verbs), but they describe a relation between the subject and the main verb. The main verb is connected in the infinitive form.
auxilliaire de mode
modal verb + infinitive
I want to eat.
I must eat.
I shall eat.
I can eat.
I may eat.
* there are two possible meanings for these modals
(vouloir = to want to; would like to; pouvoir = can, may)