In Paris: 'vouloir' and 'devoir'

[ai] is pronounced as in 'vrai' and [i] as in 'midi'. Both are oral vowel sounds. Devoir, pouvoir, savoir and vouloir are modal verbs, they are usually followed by a second verb in the infinitive form. Savoir and pouvoir both mean 'can' but 'savoir' is used for activities requiring specific skills, knowing 'how to' do. In two-verb structures with infinitives, 'how' and 'how often' adverbs come before the infinitive. In negative sentences with two-verb structures with infinitives, ne ...pas surrounds the first verb, before the adverb.