must summate
Regular verb: summate - summated- summated

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not summate
you must not summate
he must not summate
we must not summate
you must not summate
they must not summate 	I must not be summating
you must not be summating
he must not be summating
we must not be summating
you must not be summating
they must not be summating	I must not have summated
you must not have summated
he must not have summated
we must not have summated
you must not have summated
they must not have summated	I must not have been summating
you must not have been summating
he must not have been summating
we must not have been summating
you must not have been summating
they must not have been summating	

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

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