must deduct
Regular verb: deduct - deducted- deducted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must deduct
you must deduct
he must deduct
we must deduct
you must deduct
they must deduct 	I must be deducting
you must be deducting
he must be deducting
we must be deducting
you must be deducting
they must be deducting	I must have deducted
you must have deducted
he must have deducted
we must have deducted
you must have deducted
they must have deducted	I must have been deducting
you must have been deducting
he must have been deducting
we must have been deducting
you must have been deducting
they must have been deducting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't deduct
you mustn't deduct
he mustn't deduct
we mustn't deduct
you mustn't deduct
they mustn't deduct 	I mustn't be deducting
you mustn't be deducting
he mustn't be deducting
we mustn't be deducting
you mustn't be deducting
they mustn't be deducting	I mustn't have deducted
you mustn't have deducted
he mustn't have deducted
we mustn't have deducted
you mustn't have deducted
they mustn't have deducted	I mustn't have been deducting
you mustn't have been deducting
he mustn't have been deducting
we mustn't have been deducting
you mustn't have been deducting
they mustn't have been deducting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I deduct?
must you deduct?
must he deduct?
must we deduct?
must you deduct?
must they deduct? 	must I be deducting?
must you be deducting?
must he be deducting?
must we be deducting?
must you be deducting?
must they be deducting? 	must I have deducted?
must you have deducted?
must he have deducted?
must we have deducted?
must you have deducted?
must they have deducted? 	must I have been deducting?
must you have been deducting?
must he have been deducting?
must we have been deducting?
must you have been deducting?
must they have been deducting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I deduct?
mustn't you deduct?
mustn't he deduct?
mustn't we deduct?
mustn't you deduct?
mustn't they deduct? 	mustn't I be deducting?
mustn't you be deducting?
mustn't he be deducting?
mustn't we be deducting?
mustn't you be deducting?
mustn't they be deducting? 	mustn't I have deducted?
mustn't you have deducted?
mustn't he have deducted?
mustn't we have deducted?
mustn't you have deducted?
mustn't they have deducted? 	mustn't I have been deducting?
mustn't you have been deducting?
mustn't he have been deducting?
mustn't we have been deducting?
mustn't you have been deducting?
mustn't they have been deducting?