I could downgrade you could downgrade he could downgrade we could downgrade you could downgrade they could downgrade
Forme en V-ing
I could be downgrading you could be downgrading he could be downgrading we could be downgrading you could be downgrading they could be downgrading
Perfect
I could have downgraded you could have downgraded he could have downgraded we could have downgraded you could have downgraded they could have downgraded
Perfect en V-ing
I could have been downgrading you could have been downgrading he could have been downgrading we could have been downgrading you could have been downgrading they could have been downgrading
Négation
Forme simple
I couldn't downgrade you couldn't downgrade he couldn't downgrade we couldn't downgrade you couldn't downgrade they couldn't downgrade
Forme en V-ing
I couldn't be downgrading you couldn't be downgrading he couldn't be downgrading we couldn't be downgrading you couldn't be downgrading they couldn't be downgrading
Perfect
I couldn't have downgraded you couldn't have downgraded he couldn't have downgraded we couldn't have downgraded you couldn't have downgraded they couldn't have downgraded
Perfect en V-ing
I couldn't have been downgrading you couldn't have been downgrading he couldn't have been downgrading we couldn't have been downgrading you couldn't have been downgrading they couldn't have been downgrading
Forme interrogative
Forme simple
could I downgrade? could you downgrade? could he downgrade? could we downgrade? could you downgrade? could they downgrade?
Forme en V-ing
could I be downgrading? could you be downgrading? could he be downgrading? could we be downgrading? could you be downgrading? could they be downgrading?
Perfect
could I have downgraded? could you have downgraded? could he have downgraded? could we have downgraded? could you have downgraded? could they have downgraded?
Perfect en V-ing
could I have been downgrading? could you have been downgrading? could he have been downgrading? could we have been downgrading? could you have been downgrading? could they have been downgrading?
Forme interro-négative
Forme simple
couldn't I downgrade? couldn't you downgrade? couldn't he downgrade? couldn't we downgrade? couldn't you downgrade? couldn't they downgrade?
Forme en V-ing
couldn't I be downgrading? couldn't you be downgrading? couldn't he be downgrading? couldn't we be downgrading? couldn't you be downgrading? couldn't they be downgrading?
Perfect
couldn't I have downgraded? couldn't you have downgraded? couldn't he have downgraded? couldn't we have downgraded? couldn't you have downgraded? couldn't they have downgraded?
Perfect en V-ing
couldn't I have been downgrading? couldn't you have been downgrading? couldn't he have been downgrading? couldn't we have been downgrading? couldn't you have been downgrading? couldn't they have been downgrading?