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 mustn't presurvey
you mustn't presurvey
he mustn't presurvey
we mustn't presurvey
you mustn't presurvey
they mustn't presurvey 	I mustn't be presurveying
you mustn't be presurveying
he mustn't be presurveying
we mustn't be presurveying
you mustn't be presurveying
they mustn't be presurveying	I mustn't have presurveyed
you mustn't have presurveyed
he mustn't have presurveyed
we mustn't have presurveyed
you mustn't have presurveyed
they mustn't have presurveyed	I mustn't have been presurveying
you mustn't have been presurveying
he mustn't have been presurveying
we mustn't have been presurveying
you mustn't have been presurveying
they mustn't 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 	
mustn't I presurvey?
mustn't you presurvey?
mustn't he presurvey?
mustn't we presurvey?
mustn't you presurvey?
mustn't they presurvey? 	mustn't I be presurveying?
mustn't you be presurveying?
mustn't he be presurveying?
mustn't we be presurveying?
mustn't you be presurveying?
mustn't they be presurveying? 	mustn't I have presurveyed?
mustn't you have presurveyed?
mustn't he have presurveyed?
mustn't we have presurveyed?
mustn't you have presurveyed?
mustn't they have presurveyed? 	mustn't I have been presurveying?
mustn't you have been presurveying?
mustn't he have been presurveying?
mustn't we have been presurveying?
mustn't you have been presurveying?
mustn't they have been presurveying?