must destabilize
Regular verb: destabilize - destabilized- destabilized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must destabilize
you must destabilize
she must destabilize
we must destabilize
you must destabilize
they must destabilize 	I must be destabilizing
you must be destabilizing
she must be destabilizing
we must be destabilizing
you must be destabilizing
they must be destabilizing	I must have destabilized
you must have destabilized
she must have destabilized
we must have destabilized
you must have destabilized
they must have destabilized	I must have been destabilizing
you must have been destabilizing
she must have been destabilizing
we must have been destabilizing
you must have been destabilizing
they must have been destabilizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't destabilize
you mustn't destabilize
she mustn't destabilize
we mustn't destabilize
you mustn't destabilize
they mustn't destabilize 	I mustn't be destabilizing
you mustn't be destabilizing
she mustn't be destabilizing
we mustn't be destabilizing
you mustn't be destabilizing
they mustn't be destabilizing	I mustn't have destabilized
you mustn't have destabilized
she mustn't have destabilized
we mustn't have destabilized
you mustn't have destabilized
they mustn't have destabilized	I mustn't have been destabilizing
you mustn't have been destabilizing
she mustn't have been destabilizing
we mustn't have been destabilizing
you mustn't have been destabilizing
they mustn't have been destabilizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I destabilize?
must you destabilize?
must she destabilize?
must we destabilize?
must you destabilize?
must they destabilize? 	must I be destabilizing?
must you be destabilizing?
must she be destabilizing?
must we be destabilizing?
must you be destabilizing?
must they be destabilizing? 	must I have destabilized?
must you have destabilized?
must she have destabilized?
must we have destabilized?
must you have destabilized?
must they have destabilized? 	must I have been destabilizing?
must you have been destabilizing?
must she have been destabilizing?
must we have been destabilizing?
must you have been destabilizing?
must they have been destabilizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I destabilize?
mustn't you destabilize?
mustn't she destabilize?
mustn't we destabilize?
mustn't you destabilize?
mustn't they destabilize? 	mustn't I be destabilizing?
mustn't you be destabilizing?
mustn't she be destabilizing?
mustn't we be destabilizing?
mustn't you be destabilizing?
mustn't they be destabilizing? 	mustn't I have destabilized?
mustn't you have destabilized?
mustn't she have destabilized?
mustn't we have destabilized?
mustn't you have destabilized?
mustn't they have destabilized? 	mustn't I have been destabilizing?
mustn't you have been destabilizing?
mustn't she have been destabilizing?
mustn't we have been destabilizing?
mustn't you have been destabilizing?
mustn't they have been destabilizing?