Les propositions infinitives:

avec want/would like/ask/expect/allow/advise/prefer/:
ex 1: I want to become a sailor. (ici, le sujet de want est aussi le sujet de become)
ex 2: The father wants his son to become a teacher.
= The father wants him to become a teacher
(ici, le sujet de want est différent du sujet de become et l'on remarque que le sujet de become est sous la forme d'un nom ou d'un pronom complément)

Captain Cook didn't expect to find a stowaway on the Endeavour.
He asked Nicholas to work with the surgeon.
He expected him to earn his trip with hard work.