must misunderstand
Irregular verb: misunderstand - misunderstood- misunderstood

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must misunderstand
you must misunderstand
he must misunderstand
we must misunderstand
you must misunderstand
they must misunderstand 	I must be misunderstanding
you must be misunderstanding
he must be misunderstanding
we must be misunderstanding
you must be misunderstanding
they must be misunderstanding	I must have misunderstood
you must have misunderstood
he must have misunderstood
we must have misunderstood
you must have misunderstood
they must have misunderstood	I must have been misunderstanding
you must have been misunderstanding
he must have been misunderstanding
we must have been misunderstanding
you must have been misunderstanding
they must have been misunderstanding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't misunderstand
you mustn't misunderstand
he mustn't misunderstand
we mustn't misunderstand
you mustn't misunderstand
they mustn't misunderstand 	I mustn't be misunderstanding
you mustn't be misunderstanding
he mustn't be misunderstanding
we mustn't be misunderstanding
you mustn't be misunderstanding
they mustn't be misunderstanding	I mustn't have misunderstood
you mustn't have misunderstood
he mustn't have misunderstood
we mustn't have misunderstood
you mustn't have misunderstood
they mustn't have misunderstood	I mustn't have been misunderstanding
you mustn't have been misunderstanding
he mustn't have been misunderstanding
we mustn't have been misunderstanding
you mustn't have been misunderstanding
they mustn't have been misunderstanding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I misunderstand?
must you misunderstand?
must he misunderstand?
must we misunderstand?
must you misunderstand?
must they misunderstand? 	must I be misunderstanding?
must you be misunderstanding?
must he be misunderstanding?
must we be misunderstanding?
must you be misunderstanding?
must they be misunderstanding? 	must I have misunderstood?
must you have misunderstood?
must he have misunderstood?
must we have misunderstood?
must you have misunderstood?
must they have misunderstood? 	must I have been misunderstanding?
must you have been misunderstanding?
must he have been misunderstanding?
must we have been misunderstanding?
must you have been misunderstanding?
must they have been misunderstanding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I misunderstand?
mustn't you misunderstand?
mustn't he misunderstand?
mustn't we misunderstand?
mustn't you misunderstand?
mustn't they misunderstand? 	mustn't I be misunderstanding?
mustn't you be misunderstanding?
mustn't he be misunderstanding?
mustn't we be misunderstanding?
mustn't you be misunderstanding?
mustn't they be misunderstanding? 	mustn't I have misunderstood?
mustn't you have misunderstood?
mustn't he have misunderstood?
mustn't we have misunderstood?
mustn't you have misunderstood?
mustn't they have misunderstood? 	mustn't I have been misunderstanding?
mustn't you have been misunderstanding?
mustn't he have been misunderstanding?
mustn't we have been misunderstanding?
mustn't you have been misunderstanding?
mustn't they have been misunderstanding?