could vibrate
Verbo regolare: vibrate - vibrated- vibrated

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could vibrate
you could vibrate
he could vibrate
we could vibrate
you could vibrate
they could vibrate 	I could be vibrating
you could be vibrating
he could be vibrating
we could be vibrating
you could be vibrating
they could be vibrating	I could have vibrated
you could have vibrated
he could have vibrated
we could have vibrated
you could have vibrated
they could have vibrated	I could have been vibrating
you could have been vibrating
he could have been vibrating
we could have been vibrating
you could have been vibrating
they could have been vibrating	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not vibrate
you could not vibrate
he could not vibrate
we could not vibrate
you could not vibrate
they could not vibrate 	I could not be vibrating
you could not be vibrating
he could not be vibrating
we could not be vibrating
you could not be vibrating
they could not be vibrating	I could not have vibrated
you could not have vibrated
he could not have vibrated
we could not have vibrated
you could not have vibrated
they could not have vibrated	I could not have been vibrating
you could not have been vibrating
he could not have been vibrating
we could not have been vibrating
you could not have been vibrating
they could not have been vibrating	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I vibrate?
could you vibrate?
could he vibrate?
could we vibrate?
could you vibrate?
could they vibrate? 	could I be vibrating?
could you be vibrating?
could he be vibrating?
could we be vibrating?
could you be vibrating?
could they be vibrating? 	could I have vibrated?
could you have vibrated?
could he have vibrated?
could we have vibrated?
could you have vibrated?
could they have vibrated? 	could I have been vibrating?
could you have been vibrating?
could he have been vibrating?
could we have been vibrating?
could you have been vibrating?
could they have been vibrating? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not vibrate?
could you not vibrate?
could he not vibrate?
could we not vibrate?
could you not vibrate?
could they not vibrate? 	could I not be vibrating?
could you not be vibrating?
could he not be vibrating?
could we not be vibrating?
could you not be vibrating?
could they not be vibrating? 	could I not have vibrated?
could you not have vibrated?
could he not have vibrated?
could we not have vibrated?
could you not have vibrated?
could they not have vibrated? 	could I not have been vibrating?
could you not have been vibrating?
could he not have been vibrating?
could we not have been vibrating?
could you not have been vibrating?
could they not have been vibrating?