can summon
Regular verb: summon - summoned- summoned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can summon
you can summon
she can summon
we can summon
you can summon
they can summon 	I can be summoning
you can be summoning
she can be summoning
we can be summoning
you can be summoning
they can be summoning	I can have summoned
you can have summoned
she can have summoned
we can have summoned
you can have summoned
they can have summoned	I can have been summoning
you can have been summoning
she can have been summoning
we can have been summoning
you can have been summoning
they can have been summoning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot summon
you cannot summon
she cannot summon
we cannot summon
you cannot summon
they cannot summon 	I cannot be summoning
you cannot be summoning
she cannot be summoning
we cannot be summoning
you cannot be summoning
they cannot be summoning	I cannot have summoned
you cannot have summoned
she cannot have summoned
we cannot have summoned
you cannot have summoned
they cannot have summoned	I cannot have been summoning
you cannot have been summoning
she cannot have been summoning
we cannot have been summoning
you cannot have been summoning
they cannot have been summoning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I summon?
can you summon?
can she summon?
can we summon?
can you summon?
can they summon? 	can I be summoning?
can you be summoning?
can she be summoning?
can we be summoning?
can you be summoning?
can they be summoning? 	can I have summoned?
can you have summoned?
can she have summoned?
can we have summoned?
can you have summoned?
can they have summoned? 	can I have been summoning?
can you have been summoning?
can she have been summoning?
can we have been summoning?
can you have been summoning?
can they have been summoning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not summon?
can you not summon?
can she not summon?
can we not summon?
can you not summon?
can they not summon? 	can I not be summoning?
can you not be summoning?
can she not be summoning?
can we not be summoning?
can you not be summoning?
can they not be summoning? 	can I not have summoned?
can you not have summoned?
can she not have summoned?
can we not have summoned?
can you not have summoned?
can they not have summoned? 	can I not have been summoning?
can you not have been summoning?
can she not have been summoning?
can we not have been summoning?
can you not have been summoning?
can they not have been summoning?