must denature
Regular verb: denature - denatured- denatured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must denature
you must denature
he must denature
we must denature
you must denature
they must denature 	I must be denaturing
you must be denaturing
he must be denaturing
we must be denaturing
you must be denaturing
they must be denaturing	I must have denatured
you must have denatured
he must have denatured
we must have denatured
you must have denatured
they must have denatured	I must have been denaturing
you must have been denaturing
he must have been denaturing
we must have been denaturing
you must have been denaturing
they must have been denaturing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't denature
you mustn't denature
he mustn't denature
we mustn't denature
you mustn't denature
they mustn't denature 	I mustn't be denaturing
you mustn't be denaturing
he mustn't be denaturing
we mustn't be denaturing
you mustn't be denaturing
they mustn't be denaturing	I mustn't have denatured
you mustn't have denatured
he mustn't have denatured
we mustn't have denatured
you mustn't have denatured
they mustn't have denatured	I mustn't have been denaturing
you mustn't have been denaturing
he mustn't have been denaturing
we mustn't have been denaturing
you mustn't have been denaturing
they mustn't have been denaturing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I denature?
must you denature?
must he denature?
must we denature?
must you denature?
must they denature? 	must I be denaturing?
must you be denaturing?
must he be denaturing?
must we be denaturing?
must you be denaturing?
must they be denaturing? 	must I have denatured?
must you have denatured?
must he have denatured?
must we have denatured?
must you have denatured?
must they have denatured? 	must I have been denaturing?
must you have been denaturing?
must he have been denaturing?
must we have been denaturing?
must you have been denaturing?
must they have been denaturing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I denature?
mustn't you denature?
mustn't he denature?
mustn't we denature?
mustn't you denature?
mustn't they denature? 	mustn't I be denaturing?
mustn't you be denaturing?
mustn't he be denaturing?
mustn't we be denaturing?
mustn't you be denaturing?
mustn't they be denaturing? 	mustn't I have denatured?
mustn't you have denatured?
mustn't he have denatured?
mustn't we have denatured?
mustn't you have denatured?
mustn't they have denatured? 	mustn't I have been denaturing?
mustn't you have been denaturing?
mustn't he have been denaturing?
mustn't we have been denaturing?
mustn't you have been denaturing?
mustn't they have been denaturing?