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