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