could frustrate
Verbo regolare: frustrate - frustrated- frustrated

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could frustrate
you could frustrate
he could frustrate
we could frustrate
you could frustrate
they could frustrate 	I could be frustrating
you could be frustrating
he could be frustrating
we could be frustrating
you could be frustrating
they could be frustrating	I could have frustrated
you could have frustrated
he could have frustrated
we could have frustrated
you could have frustrated
they could have frustrated	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	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not frustrate
you could not frustrate
he could not frustrate
we could not frustrate
you could not frustrate
they could not frustrate 	I could not be frustrating
you could not be frustrating
he could not be frustrating
we could not be frustrating
you could not be frustrating
they could not be frustrating	I could not have frustrated
you could not have frustrated
he could not have frustrated
we could not have frustrated
you could not have frustrated
they could not have frustrated	I could not have been frustrating
you could not have been frustrating
he could not have been frustrating
we could not have been frustrating
you could not have been frustrating
they could not have been frustrating	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I frustrate?
could you frustrate?
could he frustrate?
could we frustrate?
could you frustrate?
could they frustrate? 	could I be frustrating?
could you be frustrating?
could he be frustrating?
could we be frustrating?
could you be frustrating?
could they be frustrating? 	could I have frustrated?
could you have frustrated?
could he have frustrated?
could we have frustrated?
could you have frustrated?
could they have frustrated? 	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? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not frustrate?
could you not frustrate?
could he not frustrate?
could we not frustrate?
could you not frustrate?
could they not frustrate? 	could I not be frustrating?
could you not be frustrating?
could he not be frustrating?
could we not be frustrating?
could you not be frustrating?
could they not be frustrating? 	could I not have frustrated?
could you not have frustrated?
could he not have frustrated?
could we not have frustrated?
could you not have frustrated?
could they not have frustrated? 	could I not have been frustrating?
could you not have been frustrating?
could he not have been frustrating?
could we not have been frustrating?
could you not have been frustrating?
could they not have been frustrating?