must disintegrate
Regular verb: disintegrate - disintegrated- disintegrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must disintegrate
you must disintegrate
she must disintegrate
we must disintegrate
you must disintegrate
they must disintegrate 	I must be disintegrating
you must be disintegrating
she must be disintegrating
we must be disintegrating
you must be disintegrating
they must be disintegrating	I must have disintegrated
you must have disintegrated
she must have disintegrated
we must have disintegrated
you must have disintegrated
they must have disintegrated	I must have been disintegrating
you must have been disintegrating
she must have been disintegrating
we must have been disintegrating
you must have been disintegrating
they must have been disintegrating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't disintegrate
you mustn't disintegrate
she mustn't disintegrate
we mustn't disintegrate
you mustn't disintegrate
they mustn't disintegrate 	I mustn't be disintegrating
you mustn't be disintegrating
she mustn't be disintegrating
we mustn't be disintegrating
you mustn't be disintegrating
they mustn't be disintegrating	I mustn't have disintegrated
you mustn't have disintegrated
she mustn't have disintegrated
we mustn't have disintegrated
you mustn't have disintegrated
they mustn't have disintegrated	I mustn't have been disintegrating
you mustn't have been disintegrating
she mustn't have been disintegrating
we mustn't have been disintegrating
you mustn't have been disintegrating
they mustn't have been disintegrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I disintegrate?
must you disintegrate?
must she disintegrate?
must we disintegrate?
must you disintegrate?
must they disintegrate? 	must I be disintegrating?
must you be disintegrating?
must she be disintegrating?
must we be disintegrating?
must you be disintegrating?
must they be disintegrating? 	must I have disintegrated?
must you have disintegrated?
must she have disintegrated?
must we have disintegrated?
must you have disintegrated?
must they have disintegrated? 	must I have been disintegrating?
must you have been disintegrating?
must she have been disintegrating?
must we have been disintegrating?
must you have been disintegrating?
must they have been disintegrating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I disintegrate?
mustn't you disintegrate?
mustn't she disintegrate?
mustn't we disintegrate?
mustn't you disintegrate?
mustn't they disintegrate? 	mustn't I be disintegrating?
mustn't you be disintegrating?
mustn't she be disintegrating?
mustn't we be disintegrating?
mustn't you be disintegrating?
mustn't they be disintegrating? 	mustn't I have disintegrated?
mustn't you have disintegrated?
mustn't she have disintegrated?
mustn't we have disintegrated?
mustn't you have disintegrated?
mustn't they have disintegrated? 	mustn't I have been disintegrating?
mustn't you have been disintegrating?
mustn't she have been disintegrating?
mustn't we have been disintegrating?
mustn't you have been disintegrating?
mustn't they have been disintegrating?