must precanvass
Regular verb: precanvass - precanvassed- precanvassed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must precanvass
you must precanvass
he must precanvass
we must precanvass
you must precanvass
they must precanvass 	I must be precanvassing
you must be precanvassing
he must be precanvassing
we must be precanvassing
you must be precanvassing
they must be precanvassing	I must have precanvassed
you must have precanvassed
he must have precanvassed
we must have precanvassed
you must have precanvassed
they must have precanvassed	I must have been precanvassing
you must have been precanvassing
he must have been precanvassing
we must have been precanvassing
you must have been precanvassing
they must have been precanvassing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not precanvass
you must not precanvass
he must not precanvass
we must not precanvass
you must not precanvass
they must not precanvass 	I must not be precanvassing
you must not be precanvassing
he must not be precanvassing
we must not be precanvassing
you must not be precanvassing
they must not be precanvassing	I must not have precanvassed
you must not have precanvassed
he must not have precanvassed
we must not have precanvassed
you must not have precanvassed
they must not have precanvassed	I must not have been precanvassing
you must not have been precanvassing
he must not have been precanvassing
we must not have been precanvassing
you must not have been precanvassing
they must not have been precanvassing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I precanvass?
must you precanvass?
must he precanvass?
must we precanvass?
must you precanvass?
must they precanvass? 	must I be precanvassing?
must you be precanvassing?
must he be precanvassing?
must we be precanvassing?
must you be precanvassing?
must they be precanvassing? 	must I have precanvassed?
must you have precanvassed?
must he have precanvassed?
must we have precanvassed?
must you have precanvassed?
must they have precanvassed? 	must I have been precanvassing?
must you have been precanvassing?
must he have been precanvassing?
must we have been precanvassing?
must you have been precanvassing?
must they have been precanvassing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not precanvass?
must you not precanvass?
must he not precanvass?
must we not precanvass?
must you not precanvass?
must they not precanvass? 	must I not be precanvassing?
must you not be precanvassing?
must he not be precanvassing?
must we not be precanvassing?
must you not be precanvassing?
must they not be precanvassing? 	must I not have precanvassed?
must you not have precanvassed?
must he not have precanvassed?
must we not have precanvassed?
must you not have precanvassed?
must they not have precanvassed? 	must I not have been precanvassing?
must you not have been precanvassing?
must he not have been precanvassing?
must we not have been precanvassing?
must you not have been precanvassing?
must they not have been precanvassing?