Bonjour,
Réponse :
a. You will understand when you are older. (be)
b.As long as you have such a behaviour, you won't play video games. (have)
c. I don't know when he will be able to live independently. (be able to)
d. They think they will pass their exams effortlessly. (pass)
e. Elizabeth will stay at school until I fetch her. (fetch)
f. As soon as the plane lands, the steward will allow us to switch on our devices. (land)
Explications :
"when / as soon as / as long as ..." introduisent des subordonnées de temps à sens futur qui doivent être au présent simple en anglais.
Le verbe de la principale est au futur ( will+base verbale )
