must defang
Regular verb: defang - defanged- defanged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must defang
you must defang
she must defang
we must defang
you must defang
they must defang 	I must be defanging
you must be defanging
she must be defanging
we must be defanging
you must be defanging
they must be defanging	I must have defanged
you must have defanged
she must have defanged
we must have defanged
you must have defanged
they must have defanged	I must have been defanging
you must have been defanging
she must have been defanging
we must have been defanging
you must have been defanging
they must have been defanging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't defang
you mustn't defang
she mustn't defang
we mustn't defang
you mustn't defang
they mustn't defang 	I mustn't be defanging
you mustn't be defanging
she mustn't be defanging
we mustn't be defanging
you mustn't be defanging
they mustn't be defanging	I mustn't have defanged
you mustn't have defanged
she mustn't have defanged
we mustn't have defanged
you mustn't have defanged
they mustn't have defanged	I mustn't have been defanging
you mustn't have been defanging
she mustn't have been defanging
we mustn't have been defanging
you mustn't have been defanging
they mustn't have been defanging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I defang?
must you defang?
must she defang?
must we defang?
must you defang?
must they defang? 	must I be defanging?
must you be defanging?
must she be defanging?
must we be defanging?
must you be defanging?
must they be defanging? 	must I have defanged?
must you have defanged?
must she have defanged?
must we have defanged?
must you have defanged?
must they have defanged? 	must I have been defanging?
must you have been defanging?
must she have been defanging?
must we have been defanging?
must you have been defanging?
must they have been defanging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I defang?
mustn't you defang?
mustn't she defang?
mustn't we defang?
mustn't you defang?
mustn't they defang? 	mustn't I be defanging?
mustn't you be defanging?
mustn't she be defanging?
mustn't we be defanging?
mustn't you be defanging?
mustn't they be defanging? 	mustn't I have defanged?
mustn't you have defanged?
mustn't she have defanged?
mustn't we have defanged?
mustn't you have defanged?
mustn't they have defanged? 	mustn't I have been defanging?
mustn't you have been defanging?
mustn't she have been defanging?
mustn't we have been defanging?
mustn't you have been defanging?
mustn't they have been defanging?