I could frustrate you could frustrate she could frustrate we could frustrate you could frustrate they could frustrate
Forme en V-ing
I could be frustrating you could be frustrating she could be frustrating we could be frustrating you could be frustrating they could be frustrating
Perfect
I could have frustrated you could have frustrated she 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 she could have been frustrating we could have been frustrating you could have been frustrating they could have been frustrating
Négation
Forme simple
I could not frustrate you could not frustrate she could not frustrate we could not frustrate you could not frustrate they could not frustrate
Forme en V-ing
I could not be frustrating you could not be frustrating she could not be frustrating we could not be frustrating you could not be frustrating they could not be frustrating
Perfect
I could not have frustrated you could not have frustrated she could not have frustrated we could not have frustrated you could not have frustrated they could not have frustrated
Perfect en V-ing
I could not have been frustrating you could not have been frustrating she could not have been frustrating we could not have been frustrating you could not have been frustrating they could not have been frustrating
Forme interrogative
Forme simple
could I frustrate? could you frustrate? could she frustrate? could we frustrate? could you frustrate? could they frustrate?
Forme en V-ing
could I be frustrating? could you be frustrating? could she be frustrating? could we be frustrating? could you be frustrating? could they be frustrating?
Perfect
could I have frustrated? could you have frustrated? could she 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 she have been frustrating? could we have been frustrating? could you have been frustrating? could they have been frustrating?
Forme interro-négative
Forme simple
could I not frustrate? could you not frustrate? could she not frustrate? could we not frustrate? could you not frustrate? could they not frustrate?
Forme en V-ing
could I not be frustrating? could you not be frustrating? could she not be frustrating? could we not be frustrating? could you not be frustrating? could they not be frustrating?
Perfect
could I not have frustrated? could you not have frustrated? could she not have frustrated? could we not have frustrated? could you not have frustrated? could they not have frustrated?
Perfect en V-ing
could I not have been frustrating? could you not have been frustrating? could she not have been frustrating? could we not have been frustrating? could you not have been frustrating? could they not have been frustrating?