must presurvey
Regular verb: presurvey - presurveyed- presurveyed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must presurvey
you must presurvey
he must presurvey
we must presurvey
you must presurvey
they must presurvey 	I must be presurveying
you must be presurveying
he must be presurveying
we must be presurveying
you must be presurveying
they must be presurveying	I must have presurveyed
you must have presurveyed
he must have presurveyed
we must have presurveyed
you must have presurveyed
they must have presurveyed	I must have been presurveying
you must have been presurveying
he must have been presurveying
we must have been presurveying
you must have been presurveying
they must have been presurveying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not presurvey
you must not presurvey
he must not presurvey
we must not presurvey
you must not presurvey
they must not presurvey 	I must not be presurveying
you must not be presurveying
he must not be presurveying
we must not be presurveying
you must not be presurveying
they must not be presurveying	I must not have presurveyed
you must not have presurveyed
he must not have presurveyed
we must not have presurveyed
you must not have presurveyed
they must not have presurveyed	I must not have been presurveying
you must not have been presurveying
he must not have been presurveying
we must not have been presurveying
you must not have been presurveying
they must not have been presurveying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I presurvey?
must you presurvey?
must he presurvey?
must we presurvey?
must you presurvey?
must they presurvey? 	must I be presurveying?
must you be presurveying?
must he be presurveying?
must we be presurveying?
must you be presurveying?
must they be presurveying? 	must I have presurveyed?
must you have presurveyed?
must he have presurveyed?
must we have presurveyed?
must you have presurveyed?
must they have presurveyed? 	must I have been presurveying?
must you have been presurveying?
must he have been presurveying?
must we have been presurveying?
must you have been presurveying?
must they have been presurveying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not presurvey?
must you not presurvey?
must he not presurvey?
must we not presurvey?
must you not presurvey?
must they not presurvey? 	must I not be presurveying?
must you not be presurveying?
must he not be presurveying?
must we not be presurveying?
must you not be presurveying?
must they not be presurveying? 	must I not have presurveyed?
must you not have presurveyed?
must he not have presurveyed?
must we not have presurveyed?
must you not have presurveyed?
must they not have presurveyed? 	must I not have been presurveying?
must you not have been presurveying?
must he not have been presurveying?
must we not have been presurveying?
must you not have been presurveying?
must they not have been presurveying?