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
he could summon
we could summon
you could summon
they could summon 	I could be summoning
you could be summoning
he could be summoning
we could be summoning
you could be summoning
they could be summoning	I could have summoned
you could have summoned
he 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
he 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 couldn't summon
you couldn't summon
he couldn't summon
we couldn't summon
you couldn't summon
they couldn't summon 	I couldn't be summoning
you couldn't be summoning
he couldn't be summoning
we couldn't be summoning
you couldn't be summoning
they couldn't be summoning	I couldn't have summoned
you couldn't have summoned
he couldn't have summoned
we couldn't have summoned
you couldn't have summoned
they couldn't have summoned	I couldn't have been summoning
you couldn't have been summoning
he couldn't have been summoning
we couldn't have been summoning
you couldn't have been summoning
they couldn't have been summoning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I summon?
could you summon?
could he summon?
could we summon?
could you summon?
could they summon? 	could I be summoning?
could you be summoning?
could he be summoning?
could we be summoning?
could you be summoning?
could they be summoning? 	could I have summoned?
could you have summoned?
could he 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 he 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 	
couldn't I summon?
couldn't you summon?
couldn't he summon?
couldn't we summon?
couldn't you summon?
couldn't they summon? 	couldn't I be summoning?
couldn't you be summoning?
couldn't he be summoning?
couldn't we be summoning?
couldn't you be summoning?
couldn't they be summoning? 	couldn't I have summoned?
couldn't you have summoned?
couldn't he have summoned?
couldn't we have summoned?
couldn't you have summoned?
couldn't they have summoned? 	couldn't I have been summoning?
couldn't you have been summoning?
couldn't he have been summoning?
couldn't we have been summoning?
couldn't you have been summoning?
couldn't they have been summoning?