must scaffold
Regular verb: scaffold - scaffolded- scaffolded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must scaffold
you must scaffold
he must scaffold
we must scaffold
you must scaffold
they must scaffold 	I must be scaffolding
you must be scaffolding
he must be scaffolding
we must be scaffolding
you must be scaffolding
they must be scaffolding	I must have scaffolded
you must have scaffolded
he must have scaffolded
we must have scaffolded
you must have scaffolded
they must have scaffolded	I must have been scaffolding
you must have been scaffolding
he must have been scaffolding
we must have been scaffolding
you must have been scaffolding
they must have been scaffolding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not scaffold
you must not scaffold
he must not scaffold
we must not scaffold
you must not scaffold
they must not scaffold 	I must not be scaffolding
you must not be scaffolding
he must not be scaffolding
we must not be scaffolding
you must not be scaffolding
they must not be scaffolding	I must not have scaffolded
you must not have scaffolded
he must not have scaffolded
we must not have scaffolded
you must not have scaffolded
they must not have scaffolded	I must not have been scaffolding
you must not have been scaffolding
he must not have been scaffolding
we must not have been scaffolding
you must not have been scaffolding
they must not have been scaffolding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I scaffold?
must you scaffold?
must he scaffold?
must we scaffold?
must you scaffold?
must they scaffold? 	must I be scaffolding?
must you be scaffolding?
must he be scaffolding?
must we be scaffolding?
must you be scaffolding?
must they be scaffolding? 	must I have scaffolded?
must you have scaffolded?
must he have scaffolded?
must we have scaffolded?
must you have scaffolded?
must they have scaffolded? 	must I have been scaffolding?
must you have been scaffolding?
must he have been scaffolding?
must we have been scaffolding?
must you have been scaffolding?
must they have been scaffolding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not scaffold?
must you not scaffold?
must he not scaffold?
must we not scaffold?
must you not scaffold?
must they not scaffold? 	must I not be scaffolding?
must you not be scaffolding?
must he not be scaffolding?
must we not be scaffolding?
must you not be scaffolding?
must they not be scaffolding? 	must I not have scaffolded?
must you not have scaffolded?
must he not have scaffolded?
must we not have scaffolded?
must you not have scaffolded?
must they not have scaffolded? 	must I not have been scaffolding?
must you not have been scaffolding?
must he not have been scaffolding?
must we not have been scaffolding?
must you not have been scaffolding?
must they not have been scaffolding?