could summon
Verbo regular: summon - summoned- summoned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could summon
you could summon
she could summon
we could summon
you could summon
they could summon 	I could be summoning
you could be summoning
she could be summoning
we could be summoning
you could be summoning
they could be summoning	I could have summoned
you could have summoned
she could have summoned
we could have summoned
you could have summoned
they could have summoned	I could have been summoning
you could have been summoning
she could have been summoning
we could have been summoning
you could have been summoning
they could have been summoning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not summon
you could not summon
she could not summon
we could not summon
you could not summon
they could not summon 	I could not be summoning
you could not be summoning
she could not be summoning
we could not be summoning
you could not be summoning
they could not be summoning	I could not have summoned
you could not have summoned
she could not have summoned
we could not have summoned
you could not have summoned
they could not have summoned	I could not have been summoning
you could not have been summoning
she could not have been summoning
we could not have been summoning
you could not have been summoning
they could not have been summoning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I summon?
could you summon?
could she summon?
could we summon?
could you summon?
could they summon? 	could I be summoning?
could you be summoning?
could she be summoning?
could we be summoning?
could you be summoning?
could they be summoning? 	could I have summoned?
could you have summoned?
could she have summoned?
could we have summoned?
could you have summoned?
could they have summoned? 	could I have been summoning?
could you have been summoning?
could she have been summoning?
could we have been summoning?
could you have been summoning?
could they have been summoning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not summon?
could you not summon?
could she not summon?
could we not summon?
could you not summon?
could they not summon? 	could I not be summoning?
could you not be summoning?
could she not be summoning?
could we not be summoning?
could you not be summoning?
could they not be summoning? 	could I not have summoned?
could you not have summoned?
could she not have summoned?
could we not have summoned?
could you not have summoned?
could they not have summoned? 	could I not have been summoning?
could you not have been summoning?
could she not have been summoning?
could we not have been summoning?
could you not have been summoning?
could they not have been summoning?