must rive
Verbo irregular: rive - rived- rived, riven

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must rive
you must rive
he must rive
we must rive
you must rive
they must rive 	I must be riving
you must be riving
he must be riving
we must be riving
you must be riving
they must be riving	I must have rived, riven
you must have rived, riven
he must have rived, riven
we must have rived, riven
you must have rived, riven
they must have rived, riven	I must have been riving
you must have been riving
he must have been riving
we must have been riving
you must have been riving
they must have been riving	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't rive
you mustn't rive
he mustn't rive
we mustn't rive
you mustn't rive
they mustn't rive 	I mustn't be riving
you mustn't be riving
he mustn't be riving
we mustn't be riving
you mustn't be riving
they mustn't be riving	I mustn't have rived, riven
you mustn't have rived, riven
he mustn't have rived, riven
we mustn't have rived, riven
you mustn't have rived, riven
they mustn't have rived, riven	I mustn't have been riving
you mustn't have been riving
he mustn't have been riving
we mustn't have been riving
you mustn't have been riving
they mustn't have been riving	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I rive?
must you rive?
must he rive?
must we rive?
must you rive?
must they rive? 	must I be riving?
must you be riving?
must he be riving?
must we be riving?
must you be riving?
must they be riving? 	must I have rived, riven?
must you have rived, riven?
must he have rived, riven?
must we have rived, riven?
must you have rived, riven?
must they have rived, riven? 	must I have been riving?
must you have been riving?
must he have been riving?
must we have been riving?
must you have been riving?
must they have been riving? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I rive?
mustn't you rive?
mustn't he rive?
mustn't we rive?
mustn't you rive?
mustn't they rive? 	mustn't I be riving?
mustn't you be riving?
mustn't he be riving?
mustn't we be riving?
mustn't you be riving?
mustn't they be riving? 	mustn't I have rived, riven?
mustn't you have rived, riven?
mustn't he have rived, riven?
mustn't we have rived, riven?
mustn't you have rived, riven?
mustn't they have rived, riven? 	mustn't I have been riving?
mustn't you have been riving?
mustn't he have been riving?
mustn't we have been riving?
mustn't you have been riving?
mustn't they have been riving?