could participate
Verbo regolare: participate - participated- participated

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could participate
you could participate
he could participate
we could participate
you could participate
they could participate 	I could be participating
you could be participating
he could be participating
we could be participating
you could be participating
they could be participating	I could have participated
you could have participated
he could have participated
we could have participated
you could have participated
they could have participated	I could have been participating
you could have been participating
he could have been participating
we could have been participating
you could have been participating
they could have been participating	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not participate
you could not participate
he could not participate
we could not participate
you could not participate
they could not participate 	I could not be participating
you could not be participating
he could not be participating
we could not be participating
you could not be participating
they could not be participating	I could not have participated
you could not have participated
he could not have participated
we could not have participated
you could not have participated
they could not have participated	I could not have been participating
you could not have been participating
he could not have been participating
we could not have been participating
you could not have been participating
they could not have been participating	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I participate?
could you participate?
could he participate?
could we participate?
could you participate?
could they participate? 	could I be participating?
could you be participating?
could he be participating?
could we be participating?
could you be participating?
could they be participating? 	could I have participated?
could you have participated?
could he have participated?
could we have participated?
could you have participated?
could they have participated? 	could I have been participating?
could you have been participating?
could he have been participating?
could we have been participating?
could you have been participating?
could they have been participating? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not participate?
could you not participate?
could he not participate?
could we not participate?
could you not participate?
could they not participate? 	could I not be participating?
could you not be participating?
could he not be participating?
could we not be participating?
could you not be participating?
could they not be participating? 	could I not have participated?
could you not have participated?
could he not have participated?
could we not have participated?
could you not have participated?
could they not have participated? 	could I not have been participating?
could you not have been participating?
could he not have been participating?
could we not have been participating?
could you not have been participating?
could they not have been participating?