can summate
Regular verb: summate - summated- summated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can summate
you can summate
she can summate
we can summate
you can summate
they can summate 	I can be summating
you can be summating
she can be summating
we can be summating
you can be summating
they can be summating	I can have summated
you can have summated
she can have summated
we can have summated
you can have summated
they can have summated	I can have been summating
you can have been summating
she can have been summating
we can have been summating
you can have been summating
they can have been summating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot summate
you cannot summate
she cannot summate
we cannot summate
you cannot summate
they cannot summate 	I cannot be summating
you cannot be summating
she cannot be summating
we cannot be summating
you cannot be summating
they cannot be summating	I cannot have summated
you cannot have summated
she cannot have summated
we cannot have summated
you cannot have summated
they cannot have summated	I cannot have been summating
you cannot have been summating
she cannot have been summating
we cannot have been summating
you cannot have been summating
they cannot have been summating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I summate?
can you summate?
can she summate?
can we summate?
can you summate?
can they summate? 	can I be summating?
can you be summating?
can she be summating?
can we be summating?
can you be summating?
can they be summating? 	can I have summated?
can you have summated?
can she have summated?
can we have summated?
can you have summated?
can they have summated? 	can I have been summating?
can you have been summating?
can she have been summating?
can we have been summating?
can you have been summating?
can they have been summating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not summate?
can you not summate?
can she not summate?
can we not summate?
can you not summate?
can they not summate? 	can I not be summating?
can you not be summating?
can she not be summating?
can we not be summating?
can you not be summating?
can they not be summating? 	can I not have summated?
can you not have summated?
can she not have summated?
can we not have summated?
can you not have summated?
can they not have summated? 	can I not have been summating?
can you not have been summating?
can she not have been summating?
can we not have been summating?
can you not have been summating?
can they not have been summating?