must rovc
Regular verb: rovc - rovced- rovced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must rovc
you must rovc
he must rovc
we must rovc
you must rovc
they must rovc 	I must be rovcing
you must be rovcing
he must be rovcing
we must be rovcing
you must be rovcing
they must be rovcing	I must have rovced
you must have rovced
he must have rovced
we must have rovced
you must have rovced
they must have rovced	I must have been rovcing
you must have been rovcing
he must have been rovcing
we must have been rovcing
you must have been rovcing
they must have been rovcing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't rovc
you mustn't rovc
he mustn't rovc
we mustn't rovc
you mustn't rovc
they mustn't rovc 	I mustn't be rovcing
you mustn't be rovcing
he mustn't be rovcing
we mustn't be rovcing
you mustn't be rovcing
they mustn't be rovcing	I mustn't have rovced
you mustn't have rovced
he mustn't have rovced
we mustn't have rovced
you mustn't have rovced
they mustn't have rovced	I mustn't have been rovcing
you mustn't have been rovcing
he mustn't have been rovcing
we mustn't have been rovcing
you mustn't have been rovcing
they mustn't have been rovcing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I rovc?
must you rovc?
must he rovc?
must we rovc?
must you rovc?
must they rovc? 	must I be rovcing?
must you be rovcing?
must he be rovcing?
must we be rovcing?
must you be rovcing?
must they be rovcing? 	must I have rovced?
must you have rovced?
must he have rovced?
must we have rovced?
must you have rovced?
must they have rovced? 	must I have been rovcing?
must you have been rovcing?
must he have been rovcing?
must we have been rovcing?
must you have been rovcing?
must they have been rovcing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I rovc?
mustn't you rovc?
mustn't he rovc?
mustn't we rovc?
mustn't you rovc?
mustn't they rovc? 	mustn't I be rovcing?
mustn't you be rovcing?
mustn't he be rovcing?
mustn't we be rovcing?
mustn't you be rovcing?
mustn't they be rovcing? 	mustn't I have rovced?
mustn't you have rovced?
mustn't he have rovced?
mustn't we have rovced?
mustn't you have rovced?
mustn't they have rovced? 	mustn't I have been rovcing?
mustn't you have been rovcing?
mustn't he have been rovcing?
mustn't we have been rovcing?
mustn't you have been rovcing?
mustn't they have been rovcing?