must discipline
Regular verb: discipline - disciplined- disciplined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must discipline
you must discipline
he must discipline
we must discipline
you must discipline
they must discipline 	I must be disciplining
you must be disciplining
he must be disciplining
we must be disciplining
you must be disciplining
they must be disciplining	I must have disciplined
you must have disciplined
he must have disciplined
we must have disciplined
you must have disciplined
they must have disciplined	I must have been disciplining
you must have been disciplining
he must have been disciplining
we must have been disciplining
you must have been disciplining
they must have been disciplining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not discipline
you must not discipline
he must not discipline
we must not discipline
you must not discipline
they must not discipline 	I must not be disciplining
you must not be disciplining
he must not be disciplining
we must not be disciplining
you must not be disciplining
they must not be disciplining	I must not have disciplined
you must not have disciplined
he must not have disciplined
we must not have disciplined
you must not have disciplined
they must not have disciplined	I must not have been disciplining
you must not have been disciplining
he must not have been disciplining
we must not have been disciplining
you must not have been disciplining
they must not have been disciplining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I discipline?
must you discipline?
must he discipline?
must we discipline?
must you discipline?
must they discipline? 	must I be disciplining?
must you be disciplining?
must he be disciplining?
must we be disciplining?
must you be disciplining?
must they be disciplining? 	must I have disciplined?
must you have disciplined?
must he have disciplined?
must we have disciplined?
must you have disciplined?
must they have disciplined? 	must I have been disciplining?
must you have been disciplining?
must he have been disciplining?
must we have been disciplining?
must you have been disciplining?
must they have been disciplining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not discipline?
must you not discipline?
must he not discipline?
must we not discipline?
must you not discipline?
must they not discipline? 	must I not be disciplining?
must you not be disciplining?
must he not be disciplining?
must we not be disciplining?
must you not be disciplining?
must they not be disciplining? 	must I not have disciplined?
must you not have disciplined?
must he not have disciplined?
must we not have disciplined?
must you not have disciplined?
must they not have disciplined? 	must I not have been disciplining?
must you not have been disciplining?
must he not have been disciplining?
must we not have been disciplining?
must you not have been disciplining?
must they not have been disciplining?