must nitride
Regular verb: nitride - nitrided- nitrided

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must nitride
you must nitride
he must nitride
we must nitride
you must nitride
they must nitride 	I must be nitriding
you must be nitriding
he must be nitriding
we must be nitriding
you must be nitriding
they must be nitriding	I must have nitrided
you must have nitrided
he must have nitrided
we must have nitrided
you must have nitrided
they must have nitrided	I must have been nitriding
you must have been nitriding
he must have been nitriding
we must have been nitriding
you must have been nitriding
they must have been nitriding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't nitride
you mustn't nitride
he mustn't nitride
we mustn't nitride
you mustn't nitride
they mustn't nitride 	I mustn't be nitriding
you mustn't be nitriding
he mustn't be nitriding
we mustn't be nitriding
you mustn't be nitriding
they mustn't be nitriding	I mustn't have nitrided
you mustn't have nitrided
he mustn't have nitrided
we mustn't have nitrided
you mustn't have nitrided
they mustn't have nitrided	I mustn't have been nitriding
you mustn't have been nitriding
he mustn't have been nitriding
we mustn't have been nitriding
you mustn't have been nitriding
they mustn't have been nitriding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I nitride?
must you nitride?
must he nitride?
must we nitride?
must you nitride?
must they nitride? 	must I be nitriding?
must you be nitriding?
must he be nitriding?
must we be nitriding?
must you be nitriding?
must they be nitriding? 	must I have nitrided?
must you have nitrided?
must he have nitrided?
must we have nitrided?
must you have nitrided?
must they have nitrided? 	must I have been nitriding?
must you have been nitriding?
must he have been nitriding?
must we have been nitriding?
must you have been nitriding?
must they have been nitriding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I nitride?
mustn't you nitride?
mustn't he nitride?
mustn't we nitride?
mustn't you nitride?
mustn't they nitride? 	mustn't I be nitriding?
mustn't you be nitriding?
mustn't he be nitriding?
mustn't we be nitriding?
mustn't you be nitriding?
mustn't they be nitriding? 	mustn't I have nitrided?
mustn't you have nitrided?
mustn't he have nitrided?
mustn't we have nitrided?
mustn't you have nitrided?
mustn't they have nitrided? 	mustn't I have been nitriding?
mustn't you have been nitriding?
mustn't he have been nitriding?
mustn't we have been nitriding?
mustn't you have been nitriding?
mustn't they have been nitriding?