must construct
Regular verb: construct - constructed- constructed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must construct
you must construct
he must construct
we must construct
you must construct
they must construct 	I must be constructing
you must be constructing
he must be constructing
we must be constructing
you must be constructing
they must be constructing	I must have constructed
you must have constructed
he must have constructed
we must have constructed
you must have constructed
they must have constructed	I must have been constructing
you must have been constructing
he must have been constructing
we must have been constructing
you must have been constructing
they must have been constructing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't construct
you mustn't construct
he mustn't construct
we mustn't construct
you mustn't construct
they mustn't construct 	I mustn't be constructing
you mustn't be constructing
he mustn't be constructing
we mustn't be constructing
you mustn't be constructing
they mustn't be constructing	I mustn't have constructed
you mustn't have constructed
he mustn't have constructed
we mustn't have constructed
you mustn't have constructed
they mustn't have constructed	I mustn't have been constructing
you mustn't have been constructing
he mustn't have been constructing
we mustn't have been constructing
you mustn't have been constructing
they mustn't have been constructing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I construct?
must you construct?
must he construct?
must we construct?
must you construct?
must they construct? 	must I be constructing?
must you be constructing?
must he be constructing?
must we be constructing?
must you be constructing?
must they be constructing? 	must I have constructed?
must you have constructed?
must he have constructed?
must we have constructed?
must you have constructed?
must they have constructed? 	must I have been constructing?
must you have been constructing?
must he have been constructing?
must we have been constructing?
must you have been constructing?
must they have been constructing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I construct?
mustn't you construct?
mustn't he construct?
mustn't we construct?
mustn't you construct?
mustn't they construct? 	mustn't I be constructing?
mustn't you be constructing?
mustn't he be constructing?
mustn't we be constructing?
mustn't you be constructing?
mustn't they be constructing? 	mustn't I have constructed?
mustn't you have constructed?
mustn't he have constructed?
mustn't we have constructed?
mustn't you have constructed?
mustn't they have constructed? 	mustn't I have been constructing?
mustn't you have been constructing?
mustn't he have been constructing?
mustn't we have been constructing?
mustn't you have been constructing?
mustn't they have been constructing?